WO2016086602A1 - Procédé d'exploitation minière préservant l'eau pour un groupe de veines de charbon à courte distance les unes des autres - Google Patents

Procédé d'exploitation minière préservant l'eau pour un groupe de veines de charbon à courte distance les unes des autres Download PDF

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Publication number
WO2016086602A1
WO2016086602A1 PCT/CN2015/078730 CN2015078730W WO2016086602A1 WO 2016086602 A1 WO2016086602 A1 WO 2016086602A1 CN 2015078730 W CN2015078730 W CN 2015078730W WO 2016086602 A1 WO2016086602 A1 WO 2016086602A1
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WIPO (PCT)
Prior art keywords
height
mining
coal
longwall
pillar
Prior art date
Application number
PCT/CN2015/078730
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English (en)
Chinese (zh)
Inventor
马立强
秦波涛
汪辉
孙海
金志远
Original Assignee
中国矿业大学
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Application filed by 中国矿业大学 filed Critical 中国矿业大学
Priority to AU2015358166A priority Critical patent/AU2015358166B2/en
Publication of WO2016086602A1 publication Critical patent/WO2016086602A1/fr

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Classifications

    • 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
    • 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

Definitions

  • the invention relates to a water retention mining method for a short coal seam group, which can protect the water resources of the shallow bedrock and the loose aquifer, improve the recovery rate of coal resources and ensure safe production.
  • the present invention provides a method for retaining water in a short-distance coal seam group, which is a shallow buried rock with low water loss and high coal resource recovery rate in the process of coal seam mining in a short distance. Classification and mining method for applicable conditions of water retaining mining in longwall working face of coal seam.
  • a method for retaining water in a near coal seam group comprising the following steps:
  • M 2 is the lower coal seam mining height, and the units of H k and M 2 are m;
  • the comprehensive mining height M Z1-2 is:
  • the comprehensive mining height M Z1-2 is:
  • M 1 is the upper coal mining height
  • M 2 is the lower coal mining height
  • h 1-2 is the normal distance between the upper and lower coal seams
  • M Z1-2 is a comprehensive mining height, and units of H L and M Z1-2 are both m;
  • the water retention in the near coal seam is carried out according to the two coal seam spacing and the height of the coal rock pillar, and the specific method is:
  • the water retention mining method is:
  • the height of the coal pillar is between 85 and 115 m
  • the height of the longwall face is selected between 4 and 5.5 m.
  • the height of the coal pillar is between 85 and 110 m
  • the height of the longwall face is selected between 4 and 5.5 m.
  • the height of the coal pillar is between 75 and 105 m
  • the height of the longwall face is selected between 4 and 5.5 m.
  • the height of the coal pillar is between 70 and 100 m
  • the height of the longwall face is selected between 4 and 5.5 m.
  • the height of the coal pillar is between 65 and 95 m
  • the height of the longwall face is selected between 4 and 5.5 m.
  • the thickness H 0 of the upper protective layer of the water guiding fracture zone of the shallow shallow coal seam water retaining mining is 15 m.
  • the method for retaining water in a short-distance coal seam group provided by the present invention has the following advantages: 1. For a near-coal coal seam group that has been subjected to upper coal seam mining at the present stage, a reasonable lower coal seam mining height can be selected according to the height of the coal rock pillar. To ensure water retention after two-layer coal mining; 2. Provide guidance and reference for the selection of reasonable upper and lower coal seam mining for water-retaining mining in unconsolidated coalfields; 3. Avoid water and soil during large-scale coal mining in the western region Provide technical support for environmental disasters such as loss, ecological damage and desertification.
  • the method for retaining water in a near-coal coal group provided by the present invention is mainly for the exploitation of shallow-buried and near-sea seams in the west, according to the established parameters of the coal seam depth of the near coal seam, the spacing of the two coal seams, and the mining height of the upper and lower coal seams.
  • the definition range of the parameters that can realize water retention mining is obtained.
  • the parameters provided by this method are simple and clear, and can provide guidance for water conservation in similar coal seams in the western mining area, which has strong practicability. The method is specifically described below.
  • the conventional empirical formulas of the fallen belt and fissure zone are not suitable for shallow-buried and close-distance coal seams.
  • According to the structural characteristics of shallow-buried thin bedrock, comprehensive consideration of the influence of hard rock and soft rock strata on the development of the fault zone and water-conducting fissures Under the premise of the law, using numerical calculation software combined with the empirical data of close-buried shallow seam mining, the heights of the fall zone and fracture zone of shallow-buried shallow-buried coal seam under different mining height conditions are analyzed and calculated, and the calculation results of typical slump zone As shown in Table 1, the calculation results of the fracture zone are shown in Table 2.
  • the comprehensive mining height M Z1-2 is:
  • the comprehensive mining height M Z1-2 is:
  • the maximum height of the water guiding fracture zone of the upper coal is calculated by the mining thickness of the upper coal, and the maximum height of the water guiding fracture zone of the lower coal is the upper and lower layers.
  • the calculation of the comprehensive mining thickness of coal is taken as the maximum height of the water-conducting fracture zone of the two-layer coal.
  • M 1 is the upper coal mining height
  • M 2 is the lower coal mining height
  • h 1-2 is the normal distance between the upper and lower coal seams.
  • the development height of the water-conducting fracture zone is as shown in Tables 3-7. "It means that the upper coal seam is raised, and the "lower coal seam” means the lower coal seam mining height, the unit is m.
  • Table 5 The height of the 15 ⁇ 20m water-conducting fissure zone between the interlayer rocks
  • Table 7 interlayer overburden is greater than 25m water-cracking zone development height
  • the thickness of the protective layer required to achieve the upper part of the water-conducting fracture zone.
  • the 4m clay layer with water-blocking capacity is regarded as the “effective water-repellent layer”.
  • the main lithology of the shallow-buried bedrock is mudstone and powder.
  • the 4 ⁇ 15m top bedrock can have the same water-blocking function as the “effective aquifer”, and finally the thickness of the protective layer is determined. It is 15m.
  • the distance between the upper and lower coal seams is 5-10 m, 10-15 m, 15-20 m, 20-25 m, and >25 m
  • the development height of the water-conducting fracture zone is shown in Table 8-12.
  • Table 8 The thickness of the minimum overburden layer for water retention mining with 5-10 m overburden
  • the height of the coal pillar is between 85 and 115 m
  • the height of the longwall face is selected between 4 and 5.5 m.
  • Table 9 The minimum overburden thickness for water retention mining with 10 ⁇ 15m overburden
  • the height of the coal pillar is between 85 and 110 m
  • the height of the longwall face is selected between 4 and 5.5 m.
  • Table 10 The thickness of the minimum overburden layer for water retention mining with 15 ⁇ 20m overburden
  • the height of the coal pillar is between 75 and 105 m
  • the height of the longwall face is selected between 4 and 5.5 m.
  • Table 11 The minimum overburden thickness for water retention mining with 20 ⁇ 25m interlayer overburden
  • the height of the coal pillar is between 70 and 100 m
  • the height of the longwall face is selected between 4 and 5.5 m.
  • Table 12 The thickness of the minimum overburden layer for water retention mining is greater than 25m.
  • the height of the coal pillar is between 65 and 95 m
  • the height of the longwall face is selected between 4 and 5.5 m.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Revetment (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

L'invention concerne un procédé d'exploitation minière préservant l'eau pour un groupe de veines de charbon à courte distance les unes des autres. Un intervalle de définition pour tous les paramètres permettant de réaliser une exploitation minière préservant l'eau est obtenu selon des paramètres fixes, notamment la profondeur d'enfouissement de la veine de charbon et la distance entre deux veines de charbon parmi les veines de charbon à courte distance les unes des autres et les profondeurs d'exploitation minière des veines de charbon supérieure et inférieure. Les paramètres obtenus par le procédé sont concis, ce qui permet d'obtenir des lignes directrices pour l'exploitation minière préservant l'eau des veines de charbon à courte distance les unes des autres similaires dans des zones minières occidentales et ont un caractère pratique très prononcé.
PCT/CN2015/078730 2014-12-01 2015-05-12 Procédé d'exploitation minière préservant l'eau pour un groupe de veines de charbon à courte distance les unes des autres WO2016086602A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2015358166A AU2015358166B2 (en) 2014-12-01 2015-05-12 Water-preserving mining method for close-distance coal seam group

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410715657.6A CN104453903B (zh) 2014-12-01 2014-12-01 一种近距煤层群保水开采方法
CN201410715657.6 2014-12-01

Publications (1)

Publication Number Publication Date
WO2016086602A1 true WO2016086602A1 (fr) 2016-06-09

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CN (1) CN104453903B (fr)
AU (1) AU2015358166B2 (fr)
WO (1) WO2016086602A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113431577A (zh) * 2021-04-28 2021-09-24 山西煤炭运销集团科学技术研究有限公司 一种极近距离煤层开采同向内错巷道布置的方法

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* Cited by examiner, † Cited by third party
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CN104453903B (zh) * 2014-12-01 2016-05-11 中国矿业大学 一种近距煤层群保水开采方法
CN105046409B (zh) * 2015-06-26 2021-04-23 中国矿业大学 煤层群上行开采可行性综合评定及技术保障体系建立方法
CN106194185B (zh) * 2016-06-17 2018-07-06 中国矿业大学(北京) 水压作用下厚松散含水层防砂安全煤岩柱的留设方法
CN107542465B (zh) * 2017-07-21 2019-03-19 陕西省地质环境监测总站 一种浅埋煤层保水开采方法及其应用
CN108119142B (zh) * 2017-11-09 2019-05-17 中国矿业大学 五图-三带-两分区保水采煤方法
CN109636065A (zh) * 2018-12-28 2019-04-16 四川大学 基于多煤层共采条件的保水采煤优化方法
CN110714754B (zh) * 2019-10-15 2023-03-14 神华神东煤炭集团有限责任公司 测定裂隙带高度及垮落带高度的方法、系统和存储介质
CN110749533B (zh) * 2019-10-31 2020-12-11 中国矿业大学 一种基于等效隔水层厚度的保水采煤判别方法

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US6672674B2 (en) * 2000-09-20 2004-01-06 Dbt Gmbh Longwall mining with blasting
CN1963148A (zh) * 2006-11-17 2007-05-16 中国矿业大学 利用结构关键层作为隔水层的保水采煤方法
CN101021154A (zh) * 2007-03-23 2007-08-22 中国矿业大学 一种薄基岩浅埋煤层长壁工作面保水开采方法
CN102505943A (zh) * 2011-11-21 2012-06-20 西安科技大学 一种水源地中小煤矿用保水采煤方法
CN102767371A (zh) * 2012-06-25 2012-11-07 西安科技大学 一种利用帷幕灌浆技术实现保水采煤的方法
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CN113431577A (zh) * 2021-04-28 2021-09-24 山西煤炭运销集团科学技术研究有限公司 一种极近距离煤层开采同向内错巷道布置的方法

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AU2015358166B2 (en) 2016-09-29

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