CN108150171A - A kind of great burying thin bedrock area high seam longwall top coal caving pressure rack water-inrush prevention method - Google Patents
A kind of great burying thin bedrock area high seam longwall top coal caving pressure rack water-inrush prevention method Download PDFInfo
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- CN108150171A CN108150171A CN201810014136.6A CN201810014136A CN108150171A CN 108150171 A CN108150171 A CN 108150171A CN 201810014136 A CN201810014136 A CN 201810014136A CN 108150171 A CN108150171 A CN 108150171A
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- 239000003245 coal Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000002265 prevention Effects 0.000 title claims abstract description 22
- 239000011435 rock Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 17
- 238000005065 mining Methods 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
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- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 239000002609 medium Substances 0.000 claims description 3
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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Abstract
The invention discloses a kind of great burying thin bedrock area high seam longwall top coal caving pressure rack water-inrush prevention methods, include the following steps：1st, using measures such as physical prospecting or probings, basement rock structure and formation parameters above coal seam are obtained；2nd, based on vital edge, classify to basement rock structure above coal seam；3rd, the classification results based on basement rock above coal seam are analyzed and determine exploitation working face overlying strata fracture structure；4th, according to exploitation working face overlying strata fracture structure, exploitation support working resistance is calculated；5th, emphasis rock stratum position and the formation parameters of water damage prevention are determined；6th, corresponding control measure is formulated according to the emphasis rock stratum position of determining water damage prevention and formation parameters.The present invention can avoid working face that pressure rack occurs, the water accident of bursting, the problem of working face halt production is caused to cause huge economic losses, realize the safety and high efficiency of coal mine.
Description
Technical field
The present invention relates to coal mining security technology areas, are put more particularly to a kind of great burying thin bedrock area high seam is comprehensive
Exploit pressure rack water-inrush prevention method.
Background technology
The coal seam reserves of China's great burying thin bedrock geological conditions are very abundant, and China mine of western, North China mining area etc. are permitted
All there are the coal seam of the special geologic condition of this great burying thin bedrock, these mining area loose seam's thickness about 200m, bases in more mining areas
Rock thickness is even within 50m, disposable more than the working thickness 6m in coal seam, and burying for these mining areas is deeper than refreshing east, and buried depth is equal
More than 200m, and coal seam is also thicker, and condition will be more increasingly complex than refreshing east, Qidong when being exploited using mining, and exploitation will
It is more difficult.Thin bedrock layer such as there is large area in the range of Lu'an mining area Sima, Nan Zhai and field with "nine squares" through mill (is less than
60m), be mainly characterized by that basement rock is thin, lithology is weaker, loose thickness, cover under basement rock coal seam it is thicker, up to 6.6m, be typical thin
Basement rock, thick surface soil, condition of thick seam.Under same geological conditions, the disposable working thickness in Huaibei Zhu Xianzhuan coal mines coal seam is even
10m is reached, bedrock thickness is even less than 40m.Under conditions of such difficulty, after working face is using mining exploitation,
If designing stope support parameter according to traditional production technique, it would become hard to that there are base object models and key stratum in basement rock, it is impossible to be formed
From steady bearing structure, pressure rack, water accident of bursting will occur for working face, and working face is caused to stop production, causes huge economic losses, Wu Fashi
Existing safety and high efficiency.
Invention content
Part in view of the shortcomings of the prior art, the purpose of the present invention is to provide a kind of great burying thin bedrock area thickness coals
Layer longwall top coal caving pressure rack water-inrush prevention method can avoid working face that pressure rack occurs, water accident of bursting, working face halt production is caused to cause
The problem of huge economic losses, realizes the safety and high efficiency of coal mine.
The purpose of the present invention is achieved through the following technical solutions：
A kind of great burying thin bedrock area high seam longwall top coal caving pressure rack water-inrush prevention method, includes the following steps：
Step1, using measures such as physical prospecting or probings, obtain basement rock structure and formation parameters above coal seam；
Step2, based on vital edge, classify to basement rock structure above the coal seam that is obtained in step1；
Step3, based on, to the classification results of basement rock above coal seam, analyzing in step2 and determine the overlying strata fracture of exploitation working face
Structure；
Step4, be broken structure according to the exploitation working face overlying strata determined in step3, calculates exploitation stent and rationally works resistance
Power；
Step5, the exploitation working face overlying strata fracture type determined according to the step1 formation parameters obtained and step3, determine
The emphasis rock stratum position of water damage prevention and formation parameters；
Step6, the emphasis rock stratum position of the water damage determined according to step5 prevention and formation parameters are formulated corresponding prevention and are arranged
It applies.
In order to preferably realize the present invention, in the step2, based on vital edge, classify to basement rock structure
Method is：
1. when key stratum is not present in overlying strata, referred to as ultra-thin basement rock；
2. when in overlying strata there are one layer of key stratum or there are during two layers of compound key stratum, referred to as thin bedrock；
3. when in overlying strata there are when two layers and above key stratum, referred to as normal thickness basement rock.
Further, working face overlying strata fracture structure is exploited in the step3 is respectively
A, ultra-thin basement rock overlying strata fracture structure, ultra-thin basement rock can not form masonry due to not having key stratum structure in overlying strata
Girder construction, and acted on by wind oxidation, the intensity of basement rock is extremely weak, and the balanced structure of stress arch is easily formed after fracture；
, there is one layer of key stratum structure in thin bedrock overlying strata in B, thin bedrock overlying strata fracture structure, key stratum can be with after being broken
Masonry girder construction is formed, and the rock stratum of key stratum overlying is by depositional environment due to being influenced, lithology is weaker, easily forms granular media
Arch structure, therefore " masonry beam+granular media arch " composite construction is easily formed after the fracture of thin bedrock overlying strata.
Further, in the step4, the computational methods for exploiting working resistance of support are
Q=Q1+Q2
Wherein, Q is working resistance of support,
Q1For direct rimrock layer, top coal weight,
Q2For the weight in the range of overburden structure.
Preferably, when Strata Overlying The Seam structure is ultra-thin basement rock structure, the Q2For the weight in the range of stress arch
Amount；When Strata Overlying The Seam structure is ultra-thin basement rock structure, the Q2For the sum of weight and masonry beam weight in granular media arch.
Further, the control measure in the Step6 is respectively：
A, according to Breaking belt maximum height empirical equation, the emphasis rock stratum position prevented with reference to the water damage obtained in Step4
And formation parameters, judge whether that adopt water flowing fractured zone links up with target water-bearing layer；
B, back production parameter and control exploitation process are controlled：Adhere to carrying out normal cyclic operation, keep working face lasting, quick
It uniformly promotes, prevents working face slowly " creeping " and intermediate hold；Rational length of stope is selected, should be had conducive to back production, management
Continue with working face, quickly propel；Big place is threatened in water damage, mining height is suitably reduced, to reduce height of water flowing fractured zone
Development；Big place is pressed in ore deposit, suitably increases mining height, to ensure that stent there are enough lower contracting abilities, ensures stent exploitation process
In be not crushed to death；
C, using the region back production pattern of first back production medium and deep, then back production superficial part, the water producing fractures of medium and deep back production are utilized
The water of unrestrained overlying aquifer carries out when the water in water-bearing layer disclosure satisfy that safety coal extraction requirement, then to superficial part coal resources
Back production；
D, using transportation roadway in upper, downstriker arrangement of the air return lane under, it can both ensure that water in overlying strata can be with
It is discharged by air return lane, and can guarantee that the coal in transportation roadway smoothly transports.
The present invention compared with the prior art, has the following advantages and advantageous effect：
The present invention can avoid working face that pressure rack occurs, water accident of bursting, and working face halt production is caused to cause huge economic losses
The problem of, realize the safety and high efficiency of coal mine.
Description of the drawings
Fig. 1 is basement rock overlying strata fracture structure diagram ultra-thin in the present invention.
Fig. 2 is thin bedrock overlying strata fracture structure diagram in the present invention.
Fig. 3 is the implementing procedure figure of the present invention.
Specific embodiment
The present invention is described in further detail, but the implementation of the present invention is not limited to this with reference to embodiment.
Embodiment
As shown in Figure 1, Figure 2 and Figure 3, a kind of great burying thin bedrock area high seam longwall top coal caving pressure rack water-inrush prevention method,
Include the following steps：
Step1, using measures such as physical prospecting or probings, obtain basement rock structure and formation parameters above coal seam；
Step2, based on vital edge, classify to basement rock structure above the coal seam that is obtained in step1；
1. when key stratum is not present in overlying strata, referred to as ultra-thin basement rock；
2. when in overlying strata there are one layer of key stratum or there are during two layers of compound key stratum, referred to as thin bedrock；
3. when in overlying strata there are when two layers and above key stratum, referred to as normal thickness basement rock.
Step3, based on, to the classification results of basement rock above coal seam, analyzing in step2 and determine the overlying strata fracture of exploitation working face
Structure；
As shown in Figure 1, ultra-thin basement rock overlying strata fracture structure, ultra-thin basement rock, can not due to not having key stratum structure in overlying strata
Masonry girder construction is formed, and is acted on by wind oxidation, the intensity of basement rock is extremely weak, and the balance knot of stress arch is easily formed after fracture
Structure；
The structure as shown in Fig. 2, thin bedrock overlying strata are broken, there are one layer of key stratum structures, key stratum in thin bedrock overlying strata to break
Masonry girder construction can be formed by having no progeny, and the rock stratum of key stratum overlying, due to being influenced by depositional environment, lithology is weaker, easily
Bulk arch structure is formed, therefore " masonry beam+granular media arch " composite construction is easily formed after the fracture of thin bedrock overlying strata.
Step4, be broken structure according to the exploitation working face overlying strata determined in step3, calculates exploitation stent and rationally works resistance
Power, computational methods are：
Q=Q1+Q2
Wherein, Q is working resistance of support,
Q1For direct rimrock layer, top coal weight,
Q2For the weight in the range of overburden structure.
Preferably, when Strata Overlying The Seam structure is ultra-thin basement rock structure, the Q2For the weight in the range of stress arch
Amount；When Strata Overlying The Seam structure is ultra-thin basement rock structure, the Q2For the sum of weight and masonry beam weight in granular media arch.
Step5, the exploitation working face overlying strata fracture type determined according to the step1 formation parameters obtained and step3, determine
The emphasis rock stratum position of water damage prevention and formation parameters；
Step6, the emphasis rock stratum position of the water damage determined according to step5 prevention and formation parameters are formulated corresponding prevention and are arranged
It applies, respectively：
A, according to Breaking belt maximum height empirical equation, the emphasis rock stratum position prevented with reference to the water damage obtained in Step4
And formation parameters, judge whether that adopt water flowing fractured zone links up with target water-bearing layer；
B, back production parameter and control exploitation process are controlled：Adhere to carrying out normal cyclic operation, keep working face lasting, quick
It uniformly promotes, prevents working face slowly " creeping " and intermediate hold；Rational length of stope is selected, should be had conducive to back production, management
Continue with working face, quickly propel；Big place is threatened in water damage, mining height is suitably reduced, to reduce height of water flowing fractured zone
Development；Big place is pressed in ore deposit, suitably increases mining height, to ensure that stent there are enough lower contracting abilities, ensures stent exploitation process
In be not crushed to death；
C, using the region back production pattern of first back production medium and deep, then back production superficial part, the water producing fractures of medium and deep back production are utilized
The water of unrestrained overlying aquifer carries out when the water in water-bearing layer disclosure satisfy that safety coal extraction requirement, then to superficial part coal resources
Back production；
D, using transportation roadway in upper, downstriker arrangement of the air return lane under, it can both ensure that water in overlying strata can be with
It is discharged by air return lane, and can guarantee that the coal in transportation roadway smoothly transports.
In conclusion description through this embodiment, can make those skilled in the art preferably implement this programme.
Claims (6)
- A kind of 1. great burying thin bedrock area high seam longwall top coal caving pressure rack water-inrush prevention method, it is characterised in that：Including following step Suddenly：Step1, using measures such as physical prospecting or probings, obtain basement rock structure and formation parameters above coal seam；Step2, based on vital edge, classify to basement rock structure above the coal seam that is obtained in step1；Step3, based on, to the classification results of basement rock above coal seam, analyzing in step2 and determine exploitation working face overlying strata fracture structure；Step4, be broken structure according to the exploitation working face overlying strata determined in step3, calculates exploitation support working resistance；Step5, the exploitation working face overlying strata fracture type determined according to the step1 formation parameters obtained and step3, determine water damage The emphasis rock stratum position of prevention and formation parameters；Step6, the emphasis rock stratum position prevented according to the water damage that step5 is determined and formation parameters formulate corresponding control measure.
- 2. a kind of great burying thin bedrock area high seam longwall top coal caving pressure rack water-inrush prevention method according to claim 1, It is characterized in that, in the step2, based on vital edge, the method classified to basement rock structure is：1. when key stratum is not present in overlying strata, referred to as ultra-thin basement rock；2. when in overlying strata there are one layer of key stratum or there are during two layers of compound key stratum, referred to as thin bedrock；3. when in overlying strata there are when two layers and above key stratum, referred to as normal thickness basement rock.
- 3. a kind of great burying thin bedrock area high seam longwall top coal caving pressure rack water-inrush prevention method according to claim 1, It is characterized in that：Working face overlying strata fracture structure is exploited in the step3 is respectivelyA, ultra-thin basement rock overlying strata fracture structure, ultra-thin basement rock can not form masonry beam knot due to not having key stratum structure in overlying strata Structure, and acted on by wind oxidation, the intensity of basement rock is extremely weak, and the balanced structure of stress arch is easily formed after fracture；, there is one layer of key stratum structure in thin bedrock overlying strata in B, thin bedrock overlying strata fracture structure, key stratum can be formed after being broken Masonry girder construction, and the rock stratum of key stratum overlying is by depositional environment due to being influenced, lithology is weaker, easily forms granular media arch knot Structure, therefore " masonry beam+granular media arch " composite construction is easily formed after the fracture of thin bedrock overlying strata.
- 4. a kind of great burying thin bedrock area high seam longwall top coal caving pressure rack water-inrush prevention method according to claim 1, It is characterized in that, in the step4, the computational methods for exploiting working resistance of support are：Q=Q1+Q2Wherein, Q is working resistance of support,Q1For direct rimrock layer, top coal weight,Q2For the weight in the range of overburden structure.
- 5. a kind of great burying thin bedrock area high seam longwall top coal caving pressure rack water-inrush prevention method according to claim 4, It is characterized in that：When Strata Overlying The Seam structure is ultra-thin basement rock structure, the Q2For the weight in the range of stress arch；When Strata Overlying The Seam structure is ultra-thin basement rock structure, the Q2For the sum of weight and masonry beam weight in granular media arch.
- 6. a kind of great burying thin bedrock area high seam longwall top coal caving pressure rack water-inrush prevention method according to claim 1, It is characterized in that, the control measure in the Step6 is respectively：A, according to Breaking belt maximum height empirical equation, the emphasis rock stratum position prevented with reference to the water damage obtained in Step4 and rock Layer parameter judges whether that adopt water flowing fractured zone links up with target water-bearing layer；B, back production parameter and control exploitation process are controlled：Adhere to carrying out normal cyclic operation, working face is kept to continue, Quick uniform It promotes, prevents working face slowly " creeping " and intermediate hold；Rational length of stope is selected, should be had conducive to back production, management and work Make face to continue, quickly propel；Big place is threatened in water damage, mining height is suitably reduced, to reduce the development of height of water flowing fractured zone； Press big place in ore deposit, suitably increase mining height, to ensure that stent has enough lower contracting abilities, ensure in stent exploitation process not by It kills；C, using the region back production pattern of first back production medium and deep, then back production superficial part, the water producing fractures using medium and deep back production are unrestrained The water of overlying aquifer carries out back production when the water in water-bearing layer disclosure satisfy that safety coal extraction requirement, then to superficial part coal resources；D, using transportation roadway upper, downstriker arrangement of the air return lane under can both ensure that the water in overlying strata can pass through Air return lane is discharged, and can guarantee that the coal in transportation roadway smoothly transports.
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Cited By (3)
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| CN115130311A (en) * | 2022-07-04 | 2022-09-30 | 河南大学 | Method for judging water inrush disaster of coal seam overlying strata separation layer |
| CN115758046A (en) * | 2022-11-14 | 2023-03-07 | 北京低碳清洁能源研究院 | Working face ultimate mining width calculation method, readable storage medium and electronic device |
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| CN115758046A (en) * | 2022-11-14 | 2023-03-07 | 北京低碳清洁能源研究院 | Working face ultimate mining width calculation method, readable storage medium and electronic device |
| CN115758046B (en) * | 2022-11-14 | 2023-05-12 | 北京低碳清洁能源研究院 | Working face limit exploitation width calculation method, readable storage medium and electronic equipment |
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Application publication date: 20180612 |
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