CN109736411A

CN109736411A - A kind of method of openpit dredging and mud disposition

Info

Publication number: CN109736411A
Application number: CN201910061166.7A
Authority: CN
Inventors: 王荣林; 黄小忠; 王亮; 祝小龙; 苗涛; 夏斯
Original assignee: Magang Group Mining Industry Co Ltd
Current assignee: Magang Group Mining Industry Co Ltd
Priority date: 2019-01-23
Filing date: 2019-01-23
Publication date: 2019-05-10

Abstract

The invention discloses a kind of methods that openpit dredging and mud are disposed, and build intercepting ditch in openpit upper step, the periphery Cai Keng charge for remittance is shut off to draining pump pond, is expelled directly out；Meanwhile constructing filter structure in case the sludge dewatering cleaned out, is then carried out muddy water layered shaping at hole bottom, i.e., the water on mud top is drained using buoyancy tank pump, then shovel dress outward transport to mud in refuse dump.The mud for adopting hole will be transported to pour into the filter structure that refuse dump has been constructed in advance, be dehydrated using self gravity nature desiccation.Method of the invention makes full use of opencast equipment, the permeability of water and the strainability of coarse crushing stone in mud, and not only equipment investment expense is lower, but also has good effect to sludge dewatering.

Description

A kind of method of openpit dredging and mud disposition

Technical field

The invention belongs to Ratio in Open-pit Mine to cheat sludge treatment technical field, and in particular to it is existing that hole mud is adopted in a kind of surface mining The method of field cleaning and mud disposition.

Background technique

For surface mine in recovery process, Atmospheric precipitation and stope periphery Local Layer water burst can wash away step side Side, causes to be scattered by the highwall ground after in-place blasting out to the bottom Cai Keng, and a large amount of mud are generated after ponding impregnates, and hinders mine Normal production work.

Existing dredging technology is chiefly used in there is no the dredging for surface mine for ground installations such as lake, river, reservoirs Technology.Due to the long-term ponding in openpit bottom, mud is in that saturation state is sunken to hole bottom, and different parts mud is heavy after precipitation Shallow lake thickness is simultaneously uneven.Mud is conveyed according to slush pump, then needs constantly to move pump housing position and change pipeline, and dilute Sludge volume amount after releasing is larger, and the time that required heap row space requirement is larger, precipitating needs is longer.Sludge treatment technology at present Using most for mechanical dehydration method, this method equipment investment is big, treatment effeciency bottom, operation and maintenance are complicated and energy consumption is higher.

Summary of the invention

To solve the above problems, use is cut the present invention provides a kind of method that openpit dredging and mud are disposed Ditch, muddy water layered shaping and the method that filter structure combines is constructed, the dredging and mud disposition for openpit propose New solution.

The specific technical proposal of the invention is:

A kind of method of openpit dredging and mud disposition, steps are as follows:

Step 1: highwall intercepting ditch is built in the slope foot of open pit slope 1, the water that will shut off is directed directly to draining Cang Shui Pond；

Step 2: buoyancy tank draining pump is arranged in the Cai Keng profundal zone relatively shallower from amount of sludge, will adopt hole bottom water pump drainage extremely Drain storehouse pond；

Step 3: after mud exposes the surface, mud is transported into stope by equipment such as backhoe, carriers and is arranged down to preparatory Build natural-dehydration in the refuse dump sludge dewatering structure completed.

Further, steps are as follows for the build of the refuse dump sludge dewatering structure:

Step 1: in the middle part of refuse dump excavate by silt space, it is desirable that space in delay it is ramp-like collected with Li Yunishui toward unilateral side, The ground dug out is stacked in downstream dam respectively and upstream row is fallen on platform；

Step 2: in one layer of anti-seepage geotextile of the upstream row laying of falling platform surface；

Step 3: by silt space bottom making a layer thickness be 0.5m coarse crushing rock layers as filter layer.

Further, it is described by silt space be delay it is ramp-like, it is low in particular close to downstream dam, fall platform close to upstream row It is high.

Further, the upstream row falls the edge of platform and is provided with reversing barricade.

Compared with prior art, the invention has the benefit that the method for the present invention is reduced by setting intercepting ditch imports hole Bottom water amount, hole bed mud water stratification handle and carry out the mode to sludge dewatering in refuse dump, sufficiently sharp compared with conventional method With mine existing device, avoid newly-increased desilting equipment and pipeline expense, eliminate low concentration mud outside bank up it is bad Environment influences, and reduces dredging cost, improves the economic benefit in mine.

Detailed description of the invention

Fig. 1 is dredging muddy water in open-air pit bottom of the present invention layering cleaning schematic diagram；

Fig. 2 is sludge dewatering structural profile illustration in refuse dump of the present invention；

1- open pit slope；2- highwall intercepting ditch；3- bottom precipitation mud；4- shallow layer precipitating water；5- buoyancy tank draining pump； 6- drains storehouse pond；1 '-refuse dump original level landforms；2 '-downstreams dam；3 '-upstream rows fall platform；4 '-coarse crushing rock layers； 5 '-downstream collecting gutters；6 '-anti-seepage geotextiles；7 '-reversing barricades；8 '-mud.

Specific embodiment

To further describe the present invention, with reference to the accompanying drawings and examples to a kind of openpit dredging of the present invention and mud The method of disposition is described in further detail.

As shown in Figure 1, a kind of method of openpit dredging and mud disposition, construction procedure is as follows:

Step 1: highwall intercepting ditch 2 is built in the slope foot of open pit slope 1, the water that will shut off is directed directly to draining Cang Shui Pond 6 is arranged multiple intercepting ditch and reduces the hole bottom water amount that imports, alleviation hole 5 pressure of bottom buoyancy tank suction pump.

Step 2: open-air pit bottom includes the shallow layer precipitating water 4 and bottom precipitation mud 3 on top, relatively shallower from amount of sludge The profundal zone Cai Keng arrange buoyancy tank draining pump 5, will adopt hole bottom water pump drainage to draining storehouse pond 6.

Step 3: after mud exposes the surface, mud is transported into stope row by equipment such as backhoe, carriers and is poured in advance It builds in the refuse dump sludge dewatering structure completed, is dehydrated using self gravity nature desiccation.

As shown in Fig. 2, above-mentioned refuse dump sludge dewatering structure is to carry out dehydration construction, construction step to mud It is rapid as follows:

Step 1: it excavates in the middle part of refuse dump by silt space, it is desirable that space is ramp-like with the past unilateral remittance of sharp 8 ' water of mud in delaying Collection, the ground dug out is stacked in downstream dam 2 ' respectively and upstream row is fallen on platform 3 '.It is ramp-like to delay by silt space, in particular close to Downstream dam 2 ' is low, and it is high to fall platform 3 ' close to upstream row, and falling mud 8 ' that platform is toppled over from upstream row in this way being capable of cloth more evenly Completely entirely by silt space bottom.

Step 2: 3 ' surface of platform is fallen in upstream row and lays one layer of anti-seepage geotextile 6 ', for completely cutting off mud 8 ', in protection Trip arranges platform, prolongs its service life.

Step 3: filter layer is being used as by the coarse crushing rock layers 4 ' that silt space bottom making a layer thickness is 0.5m, it should be noted that It needs to reserve downstream collecting gutter 5 ' in topography lowest part when laying.When mud 8 ' is fallen in coarse crushing rock layers, in self gravity work It can sink under, be filtered by coarse crushing rock layers, final water is collected to downstream collecting gutter 5 '.

Topple over mud 8 ' in order to facilitate vehicle, upstream row fall platform 3 ' edge be provided with reversing barricade 7 ', protect vehicle Safety, prevents vehicle from sliding.

The method of the present invention is reduced the hole bottom water amount that imports, hole bed mud water stratification processing by intercepting ditch and carried out in refuse dump To the mode of sludge dewatering, compared with conventional method, mine existing device is made full use of, avoids newly-increased desilting equipment and pipeline Expense, eliminate low concentration mud influences in the poor environment that outside is banked up, and reduces dredging cost, improves the economy in mine Benefit.This method makes full use of opencast equipment, the permeability of water and the strainability of coarse crushing stone in mud, not only equipment Investment cost is lower, and has preferable effect to sludge dewatering.

Claims

1. a kind of method of openpit dredging and mud disposition, characterized in that steps are as follows:

Step 1: highwall intercepting ditch (2) are built in the slope foot of open pit slope (1), the water that will shut off is directed directly to draining Cang Shui Pond (6)；

Step 2: buoyancy tank draining pump (5) are arranged in the Cai Keng profundal zone relatively shallower from amount of sludge, will adopt hole bottom water pump drainage to row Sump pond (6)；

Step 3: after mud exposes the surface, mud is transported into stope row by equipment such as backhoe, carriers and is built down to preparatory Natural-dehydration in the refuse dump sludge dewatering structure of completion.

2. the method for a kind of openpit dredging according to claim 1 and mud disposition, characterized in that the casting Steps are as follows for the build of field sludge dewatering structure:

Step 1: in the middle part of refuse dump excavate by silt space, it is desirable that space in delay it is ramp-like collected with sharp mud (8 ') water toward unilateral side, The ground dug out is stacked in downstream dam (2 ') respectively and upstream row is fallen on platform (3 ')；

Step 2: upstream row fall platform (3 ') surface lay one layer of anti-seepage geotextile (6 ')；

Step 3: filter layer is being used as by the coarse crushing rock layers (4 ') that silt space bottom making a layer thickness is 0.5m.

3. the method for a kind of openpit dredging according to claim 2 and mud disposition, characterized in that described to be become silted up Space be delay it is ramp-like, it is low in particular close to downstream dam (2 '), close to upstream row fall platform (3 ') height.

4. the method for a kind of openpit dredging according to claim 2 and mud disposition, characterized in that the upstream The edge for arranging platform (3 ') is provided with reversing barricade (7 ').

5. the method for a kind of openpit dredging according to claim 2 and mud disposition, characterized in that the step Three, it needs to reserve downstream collecting gutter (5 ') in topography lowest part when being laid with coarse crushing rock layers (4 ').