CN103513281A - Method for estimating development height of overlying strata water flowing fractured zone of solid filling and coal mining - Google Patents

Method for estimating development height of overlying strata water flowing fractured zone of solid filling and coal mining Download PDF

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CN103513281A
CN103513281A CN201310503632.5A CN201310503632A CN103513281A CN 103513281 A CN103513281 A CN 103513281A CN 201310503632 A CN201310503632 A CN 201310503632A CN 103513281 A CN103513281 A CN 103513281A
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water flowing
flowing fractured
overlying strata
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张吉雄
李猛
张强
邓雪杰
黄艳利
曹远威
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China University of Mining and Technology CUMT
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Abstract

The invention discloses a kind of solid filling coal mining overlying strata water flowing fractured zone development height method for predicting, the physical and mechanical parameter of the coal and rock obtained first according to the filling coal mining working face engineering geological condition information of collection and Rock Mechanics Test, establishes solid filling coal mining numerical model using finite element analysis software; Mining height M is constant, Full Ratio for first simulation
Figure DDA0000400299830000011
Overlying strata plastic zone height under change condition, then simulate Full Ratio Overlying strata plastic zone height constant, under mining height M change condition determines that plastic zone height is water flowing fractured zone development height H; Then based on analog result, multiple regression obtains Full Ratio
Figure DDA0000400299830000013
The relational expression of mining height M and water flowing fractured zone development height H; Last foundation filling coal mining Practical Project parameter, i.e. design Full Ratio Practical mining height Mc calculates overlying strata water flowing fractured zone development height Hc. The method, which is that solid filling coal mining overlying strata water flowing fractured zone development height is accurately estimated, provides reference, and the safe working for coal seam under water-bearing layer provides theoretical reference.

Description

Solid filling coal mining overlying strata water flowing fractured zone development height method for predicting
Technical field
The present invention relates to a kind of coal mining water flowing fractured zone development height method for predicting, particularly a kind of method for predicting that is applicable to solid filling coal mining overlying strata water flowing fractured zone development height in coal mining.
Background technology
In solid filling coal-mining technique, the solid waste such as spoil, flyash, loess and drift-sand are delivered to down-hole by ground transportation system, the vertical jettison system of solid filling material, then pass through the direct filling of underground transportation system in goaf.Because goaf filling body has carried most of load of superincumbent stratum as main support, thereby limited the movement of superincumbent stratum, the mobile destructive characteristics of superincumbent stratum is become to " two bands " (fissure zone, bending subsidence band) from " three bands " (caving zone, fissure zone and bending subsidence band), effectively reduced water flowing fractured zone development height.At present, for solid filling coal mining overlying strata water flowing fractured zone development height, also there is no a kind of method for predicting accurately, and mining height and substantial rate are the key factors that affects solid filling coal mining overlying strata water flowing fractured zone development height, therefore, the impact of research key factor on solid filling coal mining overlying strata water flowing fractured zone development height, thereby estimate exactly solid filling coal mining overlying strata water flowing fractured zone development height, significant to realizing under water-bearing zone the safe working in coal seam.
Summary of the invention
Technical matters: the object of the invention is for problems of the prior art, provide a kind of method for predicting simply, the overlying strata of solid filling coal mining accurately water flowing fractured zone development height method for predicting.
Technical scheme: solid filling coal mining overlying strata water flowing fractured zone development height method for predicting of the present invention, take engineering geological condition information and Rock Mechanics Test And as basis, the method that adopts numerical simulation to combine with multiple regression analysis, obtains the rate of enriching
Figure BDA0000400299810000011
the relational expression of mining height M and water flowing fractured zone development height H, then according to filling coal mining Practical Project parameter, i.e. rate is enriched in design
Figure BDA0000400299810000012
actual mining height M c, calculate overlying strata water flowing fractured zone development height H c, its concrete steps are as follows:
(1) collect filling coal mining workplace engineering geological condition information, and carry out coal and rock sampling;
(2) coal and rock sampling being obtained is made standard sample, carries out Rock Mechanics Test And, obtains the physical and mechanical parameter of coal and rock;
(3), according to the physical and mechanical parameter of filling coal mining workplace engineering geological condition information and coal and rock, adopt finite element analysis software to set up solid filling coal mining numerical model;
(4) first simulate constant, the substantial rate of mining height M
Figure BDA0000400299810000013
overlying strata plastic zone height under change condition, then rate is enriched in simulation overlying strata plastic zone height under constant, mining height M change condition, determines that plastic zone height is water flowing fractured zone development height H;
(5) multiple regression obtains the rate of enriching
Figure BDA0000400299810000015
the relational expression of mining height M and water flowing fractured zone development height H
Figure BDA0000400299810000016
(6) by filling coal mining Practical Project parameter, i.e. rate is enriched in design
Figure BDA0000400299810000017
actual mining height M c, substitution relational expression, calculates solid filling coal mining overlying strata water flowing fractured zone development height H c.
Described substantial rate
Figure BDA0000400299810000021
variation range be 20～90%, the variation range of mining height M is 2.5～6.0m.
Beneficial effect: solid filling coal mining overlying strata water flowing fractured zone development height method for predicting of the present invention, when practice, only need determine the substantial rate of design of solid filling coal-face, actual mining height, just can predict water flowing fractured zone development height according to regression equation, the method estimates to provide the safe working with reference to coal seam under ，Wei water-bearing zone exactly for solid filling coal mining overlying strata water flowing fractured zone development height provides theoretical reference.This method for predicting is simple, and cost is low, has practicality widely.
Accompanying drawing explanation
Fig. 1 is solid filling coal mining overlying strata water flowing fractured zone development height method for predicting process flow diagram of the present invention;
Fig. 2 is solid filling coal mining numerical evaluation model of the present invention;
Fig. 3 is that rate-water flowing fractured zone development height curve map is enriched in solid filling coal mining of the present invention;
Fig. 4 is solid filling coal mining mining height-water flowing fractured zone development height curve map of the present invention;
Fig. 5 is solid filling coal mining overlying strata water flowing fractured zone development height regression equation three-dimensional plot of the present invention.
Embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Solid filling coal mining overlying strata water flowing fractured zone development height method for predicting of the present invention, take engineering geological condition information and Rock Mechanics Test And as basis, and the method that adopts numerical simulation to combine with multiple regression analysis, obtains the rate of enriching
Figure BDA0000400299810000022
the relational expression of mining height M and water flowing fractured zone development height H, then according to filling coal mining Practical Project parameter, i.e. rate is enriched in design
Figure BDA0000400299810000023
actual mining height M c, calculate overlying strata water flowing fractured zone development height H c, concrete steps are as follows:
(1) collect filling coal mining workplace engineering geological condition information, and carry out coal and rock sampling;
(2) coal and rock sampling being obtained is made standard sample, carries out Rock Mechanics Test And, obtains the physical and mechanical parameter of coal and rock;
(3), according to the physical and mechanical parameter of filling coal mining workplace engineering geological condition information and coal and rock, adopt finite element analysis software to set up solid filling coal mining numerical model;
(4) first simulate constant, the substantial rate of mining height M
Figure BDA0000400299810000024
overlying strata plastic zone height under change condition, then rate is enriched in simulation
Figure BDA0000400299810000025
overlying strata plastic zone height under constant, mining height M change condition, determines that plastic zone height is water flowing fractured zone development height H;
(5) multiple regression obtains the rate of enriching
Figure BDA0000400299810000026
the relational expression of mining height M and water flowing fractured zone development height H
Figure BDA0000400299810000027
(6) by filling coal mining Practical Project parameter, i.e. rate is enriched in design
Figure BDA0000400299810000028
actual mining height M c, substitution relational expression, calculates solid filling coal mining overlying strata water flowing fractured zone development height H c.
Described substantial rate
Figure BDA0000400299810000029
variation range be 20～90%, the variation range of mining height M is 2.5～6.0m.
Embodiment 1 ,Yi Mou colliery is example, and concrete implementation step is as follows:
(1) the solid filling first mining face of mining in Dui Gai colliery carries out Field Research, collection work face engineering geological condition information, and carry out coal and rock sampling;
(2) coal and rock sampling being obtained is made standard sample, by rock mechanics experiment, obtains the physical and mechanical parameter of coal and rock, in Table 1;
Table 1
Figure BDA0000400299810000031
(3), according to the physical and mechanical parameter of filling coal mining workplace engineering geological condition and coal and rock, adopt FLAC 3Dnumerical simulation software is set up solid filling coal mining numerical evaluation model, as shown in Figure 2;
Model length * wide * height is 300m * 200m * 88m; The displacement of surrounding bound level direction, the displacement of bottom constraint vertical direction; Constitutive relation adopts mole of-coulomb of model.
(4) constant, the substantial rate of first analog computation mining height M
Figure BDA0000400299810000032
overlying strata plastic zone height under change condition, then rate is enriched in analog computation
Figure BDA0000400299810000033
overlying strata plastic zone height under constant, mining height M change condition, physical simulation scheme, in Table 2, determines that plastic zone height is water flowing fractured zone development height H, analog result is as shown in Figure 3,4;
Table 2
Figure BDA0000400299810000034
(5) take analog result as basis, adopt statistical analysis software SPSS, multiple regression obtains the rate of enriching
Figure BDA0000400299810000036
, mining height M and water flowing fractured zone development height H relational expression, as shown in Figure 5, expression is:
Figure BDA0000400299810000035
Its relevant mathematical statistics parameter is relative coefficient in Table 3, R, R 2for decisive coefficient, P is fiducial probability, and F is conspicuousness coefficient, as seen from table, and the concrete statistical significance of this regression model;
Table 3
Figure BDA0000400299810000041
(6) certain colliery solid filling first mining face primary design of mining is enriched rate mining height M c=3.5m, by data substitution relational expression, calculates solid filling coal mining overlying strata water flowing fractured zone development height H c=12.11m.

Claims (2)

1. a solid filling coal mining overlying strata water flowing fractured zone development height method for predicting, is characterized in that take that engineering geological condition information and Rock Mechanics Test And are as basis, and the method that adopts numerical simulation to combine with multiple regression analysis, obtains the rate of enriching
Figure FDA0000400299800000011
the relational expression of mining height M and water flowing fractured zone development height H, then according to filling coal mining Practical Project parameter, i.e. rate is enriched in design
Figure FDA0000400299800000012
actual mining height M c, calculate overlying strata water flowing fractured zone development height H c, its concrete steps are as follows:
(1) collect filling coal mining workplace engineering geological condition information, and carry out coal and rock sampling;
(2) coal and rock sampling being obtained is made standard sample, carries out Rock Mechanics Test And, obtains the physical and mechanical parameter of coal and rock;
(3), according to the physical and mechanical parameter of filling coal mining workplace engineering geological condition information and coal and rock, adopt finite element analysis software to set up solid filling coal mining numerical model;
(4) first simulate constant, the substantial rate of mining height M
Figure FDA0000400299800000013
overlying strata plastic zone height under change condition, then rate is enriched in simulation overlying strata plastic zone height under constant, mining height M change condition, determines that plastic zone height is water flowing fractured zone development height H;
(5) multiple regression obtains the rate of enriching
Figure FDA0000400299800000015
the relational expression of mining height M and water flowing fractured zone development height H
Figure FDA0000400299800000016
(6) by filling coal mining Practical Project parameter, i.e. rate is enriched in design
Figure FDA0000400299800000017
actual mining height M c, substitution relational expression, calculates solid filling coal mining overlying strata water flowing fractured zone development height H c.
2. a kind of solid filling coal mining overlying strata water flowing fractured zone development height method for predicting according to claim 1, is characterized in that: described substantial rate
Figure FDA0000400299800000018
variation range be 20～90%, the variation range of mining height M is 2.5～6.0m.
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CN103899352A (en) * 2014-04-08 2014-07-02 中国矿业大学 Filling rate design and control method for solid filing in coal mining
CN104074541A (en) * 2014-06-25 2014-10-01 中国矿业大学 Solid filling mining design method under water body
CN104866914A (en) * 2015-04-28 2015-08-26 山东科技大学 Method for predicting maximum height of filling mining diversion fissure zone
CN107808030A (en) * 2017-09-19 2018-03-16 中国石油大学(北京) A kind of discrete element simulation method for being layered stretching, extension
CN108733964A (en) * 2018-06-15 2018-11-02 中国矿业大学 Shortwall block formula coal mining overlying strata water flowing fractured zone development height prediction technique
CN109117585A (en) * 2018-09-06 2019-01-01 中国矿业大学 A kind of solid filling material internal stress determines method
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CN113324506A (en) * 2021-05-20 2021-08-31 中国建筑第五工程局有限公司 Method for predicting height of water flowing fractured zone caused by reservoir penetration under bimodal shield tunnel
CN114329922A (en) * 2021-12-06 2022-04-12 中国地质科学院地质力学研究所 Method for determining height of water flowing fractured zone based on structural overlying strata
CN114372374A (en) * 2022-01-13 2022-04-19 西安科技大学 Filling mining and working face parameter determining method for ultra-thick coal seam under water-bearing stratum of mining area
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CN114580112A (en) * 2022-03-15 2022-06-03 安徽理工大学 Coal seam roof 'two-zone' height detection method based on numerical simulation software
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