CN102352769A - Integrated mining method for commonly mining coal and gas of high mine - Google Patents
Integrated mining method for commonly mining coal and gas of high mine Download PDFInfo
- Publication number
- CN102352769A CN102352769A CN2011103214386A CN201110321438A CN102352769A CN 102352769 A CN102352769 A CN 102352769A CN 2011103214386 A CN2011103214386 A CN 2011103214386A CN 201110321438 A CN201110321438 A CN 201110321438A CN 102352769 A CN102352769 A CN 102352769A
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- gas
- coal
- extraction
- mining
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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Abstract
The invention discloses an integrated mining method for commonly mining coal and gas of a high mine. The integrated mining method comprises the following steps of: adopting a process technology which utilizes ground drilling to drain coal bed gas for carrying out gas drainage on unmined areas, and carrying out coal mining on drainage areas when the safety standard is met; for mined areas, utilizing the space of the existing roadways and gas drainage special preparation roadways under the coal mine or additionally opening large-diameter long drilling holes which have different distances from a drill site to a coal bed top plate; selecting corresponding fracturing pump stations and fracturing process technologies to carry out fracturing treatment, forming a fracture network system communicated with the coal bed in the coal bed top plate to preextract the coal bed gas; when the preextraction meets the safety standard, firstly adopting a tunneling process to tunnel an intake airway and a return airway of a work surface; distributing a stopping work surface, then carrying out construction of the conventional drainage and drilling at the intake airway and the return airway of the work surface; and by utilizing the mine pressure rule caused by the stopping of the work surface, implementing the preextraction before mining and simultaneous mining and extraction with fracturing holes, and realizing integrated mining of the coal and the gas. In the integrated mining method, the safe high-efficiency common mining of the coal and the gas can be realized and the application prospect is wide.
Description
Technical field
The present invention relates to relate to coal and gas and adopt the field altogether, particularly relate to a kind of high prominent mine coal and gas and adopt integrated exploitation method altogether.
Background technology
China is the outstanding the most serious country of disaster of coal and gas in the world; Increase along with the coal mine excavation degree of depth; The increase gradually of coal seam gas-bearing capacity and gas pressure, a lot of low gaseous mines change highly gassy mine and projecting mine into, and outstanding disaster is more and more serious.Therefore control the gas disaster, it is outstanding to eliminate coal and gas, and the best way is taken out high gas zone exactly in advance.And single, soft, projecting coal bed, because the soft difficulty of drilling, the pore-forming difficulty of causing in coal seam, and the hole of collapsing easily; Add the coal seam poor permeability, hole pumping and mining poor commonly used can't be eliminated the outburst hazard in coal seam; In the coal seam, carry out the digging activity, the outstanding disaster of coal and gas often takes place.Single, soft, projecting coal bed gas control problem is the difficult problem of gas control research all the time.
It mainly is through construction roof and floor lane, coal seam at present that single, soft, projecting coal bed gas zone is administered; Utilize roof and floor lane, coal seam to the construct method of intensive boring of coal seam, through intensive hole pumping and mining coal-bed gas, shielding tunnelling and carry out the work plane extinction; Though this method obtains good effect; But construction coal seam roof and floor roadway engineering amount is big, cost is high, long in time limit, not only increase substantially mining costs, and the problem that difficulty is taken in digging often occurs in the construction at the scene.Therefore, for an effective gas of single, soft, projecting coal bed needs zone resolution, and can not be cost with high engineering quantity, high investment, come thoroughly to change single, soft, projecting coal bed gas zone and administer present situation.
Summary of the invention
High prominent mine coal and gas are adopted integrated exploitation method altogether; Relate to the mining safety production field, purpose is that solution is soft, low thoroughly, projecting coal bed gas pumping difficulty, is prone to the difficult problem of the outstanding disaster of generation gas in the mining process; Through utilizing roof major diameter long drilled holes extraction coal-bed gas; Eliminate different the digging coal and the gas outburst risk in period, the extraction efficient of top board major diameter long drilled holes has been strengthened in the digging activity in coal seam simultaneously again, and then realizes that coal and gas adopts integrated altogether.
The objective of the invention is to realize like this:
High prominent mine coal and gas are adopted integrated exploitation method altogether; It is characterized in that: to mine after the first gas production is principle; Adopt the technology of ground drilling extraction mining coal seam gas to carry out extensive coal-bed gas extraction to the unworked country, when waiting to reach safety standard the coal high-efficiency exploitation is carried out in the extraction zone; To minery; Situation and coal body structure types are deposited in tax according to coal-bed gas; The major diameter long drilled holes of utilizing existing tunnel and the gas pumping preparatory working space of being arranged or the field of spudding in addition not to wait in the down-hole to roof construction spacing; Select corresponding pressure break pumping plant and fracturing technology technology to carry out frac treatment, in roof, form the crack network system of linking up with the coal seam, take out coal-bed gas in advance through crack network and pressure break boring; Treat that the driving technology digging work face of going ahead of the rest of selecting optimum when coal road band gas is extracted into safety standard in advance advances, return airway; Arrange stope, work plane advances then, return airway is constructed various types of conventional extraction boreholes, and rule is pressed in the ore deposit that utilizes working face extraction to cause; Before top board major diameter long drilled holes is implemented to adopt on a large scale, take out in advance and take out, realize the integrated exploitation that coal and gas are adopted altogether with Bian Caibian.
The technology of described ground drilling extraction mining coal seam gas is cbm development technologies such as ground straight well, horizontal well, cluster well, U type well.
Described gas pumping preparatory working be except that normal roadway arrangement in the exploiting field gas pumping preparatory working of serving for gas production of design stage specialized designs construction, the position in the tunnel coal seam roof and floor major diameter long drilled holes of should being convenient to construct.
Described gas pumping preparatory working is at least an exploiting field service.
Prominent mine coal of described height and gas are adopted integrated exploitation method altogether; The described major diameter long drilled holes that does not wait to roof construction spacing is arranged in the easy pore-forming roof strata in the 0 ~ 10m scope of coal seam; Work plane intending driving advances, group is flat respectively arranges one apart from the 5m position apart from the lane about above the return airway, carries out the cloth hole at the work plane middle part with the spacing of 2 times of the pressure break radiuses of influence.
Described exploiting field gas pumping is to realize through the extraction of top board major diameter long drilled holes pressure break, and gas pumping runs through entire working surface driving, recovery phase, realizes that gas pumping and coal mining complement each other the integrated exploitation of mutually promoting.
Described top board major diameter long drilled holes not only for the pressure break hole but also for preparatory extraction hole with adopt the hole; At working face extraction is pressure break and preparatory extraction hole in earlier stage; During working face extraction for adopting the hole; Parameters such as the aperture of boring, length, inclination angle, azimuth can be adjusted according to requirement of engineering and geological conditions, and the borehole fracturing influence basin can be controlled entire working surface or exploiting field.
Described pressure break pumping plant, according to pressure break ability needs, the equipment of selecting the down-hole to move the permanent pressure break pumping plant of pressure break pumping plant or connection ground carries out down-hole or aboveground associating pressing crack construction down.
Described aboveground associating pressure break down ground peupendicular hole that connects with the gas pumping preparatory working of rational position construction above the gas pumping tunnel, the equipment that connects the permanent pressure break pumping plant in ground through the ground peupendicular hole is implemented aboveground associating pressure break down.
Take out in advance with Bian Caibian before described the adopting and take out,, select the down-hole to move the extraction pump and carry out extraction or connect permanent extraction station, ground carrying out the high negative pressure extraction according to extraction ability needs.
Prominent mine coal of height of the present invention and gas are adopted integrated exploitation method altogether, from the thought of gas pumping, and leading design arrangement gas pumping system: utilize the rock stratum construction drill to be prone to the characteristics of pore-forming; Construction top board major diameter long drilled holes utilizes the top board long drilled holes to carry out fracturing, the pressure break roof in the roof rock stratum; In roof and coal seam, form the crack network of communicating with each other; Utilize top board major diameter long drilled holes to guarantee the safety that roadway workface tunnels, eliminate work plane coal and gas outburst risk, during working face extraction through crack network high negative pressure extraction coal-bed gas; Extraction work plane coal mass relief gas and goaf gas; Guarantee work plane fast, efficient back production, top board long drilled holes gas pumping spatially, run through work plane not minery, unload nip, goaf; Run through work plane preparatory stage, recovery phase in time, realized that really the coal and the gas production in the prominent coal seam of single height is integrated.
Description of drawings
Fig. 1 is that prominent mine coal of height of the present invention and gas are adopted integrated exploitation method implementing procedure sketch map altogether;
Fig. 2 does not of the present inventionly adopt the exploiting field coal and gas is adopted integrated exploitation method sketch map altogether;
Fig. 3 is A-A ' sectional drawing of Fig. 2;
Fig. 4 is B-B ' sectional drawing of Fig. 2;
Fig. 5 exploiting field of the present invention has the coal in tunnel capable of using and gas to adopt integrated exploitation method sketch map altogether;
Fig. 6 is A-A ' sectional drawing of Fig. 5;
Fig. 7 is B-B ' sectional drawing of Fig. 5.
The specific embodiment
To combine accompanying drawing of the present invention below, technical scheme of the present invention is described, obviously, described instance only is two embodiment of the present invention, rather than whole embodiment.Based on getting embodiment among the present invention, those skilled in the art are not making the every other instance that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment 1:
Like Fig. 2,3, shown in 4, a kind ofly implement coal in the coal seam and gas is adopted incorporate exploitation method altogether single, soft, low passing through.
Such exploiting field is arranged: several work planes 2 are arranged in the exploiting field, and work plane moves towards long 800m, the long 180m of tendency.Characteristics such as coal seam thickness 6m for projecting coal bed, has soft, the poor permeability of ature of coal, and coal seam gas-bearing capacity is high, pressure is big.Coal-bed gas is given prominence to problems such as serious disaster, tunnelling difficulty and is being perplexed mine production.To these problems, before the exploiting field was arranged, design gas pumping system adopted top board long drilled holes 6 extraction coal-bed gas in advance, carries out regional extinction, and shielding roadway workface driving guarantees working face extraction safety.
The practical implementation step is following:
(1) the gas pumping preparatory working 1 special according to coal-bed gas extraction design arrangement; Gas pumping preparatory working 1 is answered the position top board major diameter long drilled holes 6 of being convenient to construct; Utilize gas pumping preparatory working 1 construction top board major diameter long drilled holes 6; Drill holes is each one of work plane machine, air way left and right sides 5m scope, and work plane drilled in middle pitch of holes is 2 times (the pressure break radius of influence is 30m in this example) of the pressure break radius of influence.
(2) construction surface well 7 connects with gas pumping preparatory working 1, carries out fracturing through surface well pressure break station, 7 connection ground 8 pairs of top board major diameters long drilled holes 6, and the pressure break roof makes the crack network that formation is communicated with each other between roof and the coal seam.
(3) sealing top board large diameter borehole 7 connects 9 pairs of coal-bed gas of ground extraction pumping plant and carries out the high negative pressure extraction.
(5) the local extinction effect of checking is selected best driving mode, carries out work plane machine lane 3, air way 4 and fast and safely tunnels, and arranges open-off cut 5,2 back production of preparation face.
(6) work plane 2 gas pumpings are up to standard, and gas pressure, gas bearing capacity are reduced to below the safety standard, carry out work plane 2 back production.
Embodiment 2:
Like Fig. 5,6, shown in 7, pass through in the coal seam single, soft, low, utilize exploiting field existing tunnel enforcement coal and gas to adopt incorporate exploitation method altogether.
Such exploiting field is arranged: several work planes 2 are arranged in the exploiting field, and work plane moves towards long 800m, the long 180m of tendency.Characteristics such as coal seam thickness 6m for projecting coal bed, has soft, the poor permeability of ature of coal, and coal seam gas-bearing capacity is high, pressure is big.Coal-bed gas is given prominence to problems such as serious disaster, tunnelling difficulty and is being perplexed mine production.Existing work plane moves towards top board lane 7 in the exploiting field, can be inclined to top board long drilled holes 8 by top board lane 7 construction working faces, and (descending) roadway construction work plane moves towards top board long drilled holes 6 on the cooperation exploiting field, and shielding roadway workface driving guarantees working face extraction safety.
The practical implementation step is following:
(1) according to (descending) tunnel, mountain 1 on the coal-bed gas extraction design arrangement exploiting field; Go up (descending) tunnel, mountain 1 and answer the position top board major diameter long drilled holes 6 of being convenient to construct; Utilize work plane to move towards top board lane 7 construction top board major diameter long drilled holes 8; Top board major diameter long drilled holes is arranged in each one of work plane machine, air way left and right sides 5m scope, and top board major diameter long drilled holes 8 arranges that along the work tendency spacing of wells is 2 times (the pressure break radius of influence is 30m in this example) of the pressure break radius of influence.
(2) sealing boring is carried out fracturing to top board major diameter long drilled holes 6 and top board major diameter long drilled holes 8 respectively, through the pressure break roof, makes the crack network that formation is communicated with each other between roof and the coal seam.
(3) the gas pumping device is installed, coal-bed gas is carried out the high negative pressure extraction.
(5) the local extinction effect of checking is selected best driving mode, carries out work plane machine lane 3, air way 4 and fast and safely tunnels, and arranges open-off cut 5, the back production of preparation face.
(6) work plane 2 extractions are up to standard, and gas pressure, gas bearing capacity are reduced to below the safety standard, carry out work plane 2 back production.
Claims (10)
1. high prominent mine coal and gas are adopted integrated exploitation method altogether; It is characterized in that: to mine after the first gas production is principle; Adopt the technology of ground drilling extraction mining coal seam gas to carry out the coal-bed gas extraction to the unworked country, when waiting to reach safety standard coal mining is carried out in the extraction zone; To minery, compose according to coal-bed gas and to deposit situation and coal body structure types, the major diameter long drilled holes of under coal mine, utilizing existing tunnel and the gas pumping preparatory working space of being arranged or spudding in addition and not wait to roof construction spacing; Select corresponding pressure break pumping plant and fracturing technology technology to carry out frac treatment; In roof, form the crack network system of linking up with the coal seam, take out coal-bed gas in advance through crack network and pressure break boring, when treating that coal road band gas is extracted into safety standard in advance; The digging work face of going ahead of the rest advances, return airway; Arrange stope, advance at work plane then, return airway is constructed various types of conventional extraction boreholes that rule is pressed in the ore deposit that utilizes working face extraction to cause; Before top board major diameter long drilled holes is implemented to adopt, take out in advance and take out, realize the integrated exploitation that coal and gas are adopted altogether with Bian Caibian.
2. adopt integrated exploitation method altogether according to prominent mine coal of the said height of claim 1 and gas, it is characterized in that: the technology of described ground drilling extraction mining coal seam gas is any one in ground straight well, horizontal well, cluster well, the U type well cbm development technology.
3. adopt integrated exploitation method altogether according to prominent mine coal of the said height of claim 1 and gas; It is characterized in that: described gas pumping preparatory working is the gas pumping preparatory working of serving for gas production of the design stage specialized designs construction in the exploiting field, the position in the tunnel coal seam roof and floor major diameter long drilled holes of should being convenient to construct.
4. prominent mine coal of height according to claim 3 and gas are adopted integrated exploitation method altogether, it is characterized in that: described gas pumping preparatory working is at least an exploiting field service.
5. adopt integrated exploitation method altogether according to prominent mine coal of the said height of claim 1 and gas; It is characterized in that: the described major diameter long drilled holes that does not wait to roof construction spacing is arranged in the easy pore-forming roof strata in the 0 ~ 10m scope of coal seam; Work plane intending driving advances, group is flat respectively arranges one apart from the 5m position apart from the lane about above the return airway, carries out the cloth hole at the work plane middle part with the spacing of 2 times of the pressure break radiuses of influence.
6. adopt integrated exploitation method altogether according to prominent mine coal of the said height of claim 1 and gas; It is characterized in that: described exploiting field gas pumping is to realize through the extraction of top board major diameter long drilled holes pressure break; Gas pumping runs through entire working surface driving, recovery phase; Realize that gas pumping and coal mining complement each other the integrated exploitation of mutually promoting.
7. prominent mine coal of height according to claim 3 and gas are adopted integrated exploitation method altogether; It is characterized in that: described top board major diameter long drilled holes not only for the pressure break hole but also for preparatory extraction hole with adopt the hole; At working face extraction is pressure break and extraction hole in advance in earlier stage, during working face extraction for adopting the hole.
8. adopt integrated exploitation method altogether according to prominent mine coal of the said height of claim 1 and gas; It is characterized in that: described pressure break pumping plant; According to pressure break ability needs, the equipment of selecting the down-hole to move the permanent pressure break pumping plant of pressure break pumping plant or connection ground carries out down-hole or aboveground associating pressing crack construction down.
9. prominent mine coal of height according to claim 8 and gas are adopted integrated exploitation method altogether; It is characterized in that: described aboveground associating pressure break down ground peupendicular hole that connects with the gas pumping preparatory working of rational position construction above the gas pumping tunnel, the equipment that connects the permanent pressure break pumping plant in ground through the ground peupendicular hole is implemented aboveground associating pressure break down.
10. adopt integrated exploitation method altogether according to prominent mine coal of the said height of claim 1 and gas; It is characterized in that: take out in advance with Bian Caibian before described the adopting and take out; According to extraction ability needs, select the down-hole to move the extraction pump and carry out extraction or connect permanent extraction station, ground carrying out the high negative pressure extraction.
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Application publication date: 20120215 |