WO2017101634A1 - 综采-充填混合开采工作面充填段长度确定方法 - Google Patents

综采-充填混合开采工作面充填段长度确定方法 Download PDF

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WO2017101634A1
WO2017101634A1 PCT/CN2016/106335 CN2016106335W WO2017101634A1 WO 2017101634 A1 WO2017101634 A1 WO 2017101634A1 CN 2016106335 W CN2016106335 W CN 2016106335W WO 2017101634 A1 WO2017101634 A1 WO 2017101634A1
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mining
filling
fully mechanized
length
working face
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张吉雄
孙强
张强
闫浩
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China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology Beijing CUMTB
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Priority to RU2017146578A priority Critical patent/RU2676770C1/ru
Priority to CA2986062A priority patent/CA2986062C/en
Priority to AU2016370451A priority patent/AU2016370451A1/en
Publication of WO2017101634A1 publication Critical patent/WO2017101634A1/zh
Priority to ZA2018/00778A priority patent/ZA201800778B/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings
    • E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings

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  • the invention relates to the field of filling coal mining technology, in particular to a method for determining the length of a filling section of a fully mechanized mining-filling mixed mining working face.
  • the object of the present invention is to provide a method for determining the length of a filling section of a fully mechanized mining-filling mixed mining working face which is simple, safe and reliable, and has strong engineering applicability in view of the problems existing in the prior art.
  • the method for determining the length of the filling section of the fully mechanized mining-filling mixed mining working face of the invention firstly, the total length of the mixed working face is designed according to the production capacity requirement of the mine, and then, according to the working face of the rock protective layer, the daily calcining amount of the vermiculite is mixed with the fully mechanized mining-filling
  • the principle of equal filling quality of the filling area in the filling face of the mining face is preliminarily designed.
  • the length range of the filling section of the fully mechanized mining-filling mixed mining face is preliminarily designed.
  • the amount of meteorites produced per day from the rock protection layer is obtained by:
  • the filling material filled in the filling section of the fully mechanized mining-filling mixed mining working face is obtained by the following formula:
  • H 1ct ⁇ fillable height, m determined by the conveyor suspension height and the amount of roof sinking in advance;
  • the length of the filling section of the preliminary design fully mechanized mining-filling mixed mining face is based on M 1 ⁇ M 2 , and the simultaneous formulas (1) and (2), and the length of the filling section of the fully mechanized mining-filling mixed mining face L 1ct is obtained.
  • the scope is:
  • the length of the working face of the filling section is determined according to the development of the overlying rock fissure on the site working face and the moving characteristics of the rock stratum.
  • the length of the filling section of the fully mechanized mining-filling mixed mining face of the present invention is one of the important parameters in the analysis and design of the fully mechanized mining-filling hybrid mining technology.
  • the filling section is initially determined.
  • the length of the working face of the filling section is finally determined according to the development of the overburden fracture and the movement characteristics of the rock in the fully mechanized mining-filling mixed mining face.
  • the method is simple and practical, and can provide engineering technical guidance for the promotion and application of fully mechanized mining-filling and hybrid mining technology, further promote the coal mine underground rock to not raise the well, wash the meteorite backfilling goaf, and efficiently fill the coal mining.
  • the green mining cycle mode will be expanded to expand the scope of application of coal mining. Because the length of the filling section of the fully mechanized mining-filling mixed mining face can be designed reasonably and accurately, the theoretical determination method can be provided for the length of the filling section of the fully mechanized mining-filling mixed mining face under similar conditions.
  • the method is simple and easy to perform, has good test effect, and has strong engineering practicability and use value.
  • Figure 1 is a flow chart for designing the length of the filling section of the fully mechanized mining-filling mixed mining face.
  • Figure 2 is a plan view of the face of the fully mechanized mining-filling mixed mining face.
  • Figure 3 is a schematic diagram of the mining face of the protective layer and the fully mechanized-filled mixed mining face.
  • the method for determining the length L 1 of the fully mechanized-filled mixed mining face 11 of the present invention first determines the coal mining parameters according to the mining geological conditions, and then designs the fully mechanized mining according to the production capacity of the mine- Filling the mixed mining face 11 total length L, and then, according to the rock protective layer working face 10 daily calcinite production amount and the comprehensive mining-filling mixed mining face 11 filling section daily meteorite consumption, according to the protective layer working face and fully mechanized mining -
  • the principle of equal filling quality of filling and mining working face is preliminarily determined, and the length L 1 of the filling section of the fully mechanized mining-filling mixed mining face 11 is initially determined.
  • the overburden fracture height and gas The pumping effect determines the length L 1 of the filling section of the fully mechanized-filled mixed mining face 11; the specific steps are as follows:
  • H 1ct ⁇ fillable height, m determined by the conveyor suspension height and the amount of roof sinking in advance;
  • the filling amount of the fully mechanized mining-filling mixed mining working face 11 is related to the yield of the rock protective layer working face 10 M 1 ⁇ M 2 , and the length of the fully mechanized mining-filling mixed mining working face 11 is calculated. (1) and (2), it is concluded that the length L 1 of the filling section of the fully mechanized mining-filling mixed mining face 11 is:
  • Example 1 A 15 coal seam of a mine is a low permeability gas high gas coal seam with a coal seam thickness of 3.2 m, an average thickness of 14 coal seams of the upper protective coal seam of 0.5 m, and a distance of 13.5 m from the 15 coal seam.
  • the working face length of the mine design protective layer 150m, mining height is 1.9m, mining 1.4m rock layer, pre-extracted protective layer coal seam gas, meteorite backfilled by the protective layer filling section goaf.
  • the working face of the protected layer is 218m long and is mined by a fully mechanized-filled mixed working face.
  • the design steps for the length of the fully mechanized-filled mixed face mining filling section are as follows:
  • M 2 - 14 - 31010 face yield per day, t / day;
  • the working surface of 15 - 31010 has to be consumed more than the daily output of 14 - 31010 working face, namely: M 1 ⁇ M 2 ;
  • the cleaning rate of vermiculite is calculated at 90%, and the above calculation is carried out. It is concluded that the length of the filling section of the fully mechanized mining-filling mixed mining face is L1ct minimum of 106m, combined with the field application of the porous bottom unloading conveyor, and the on-site overlying fracture. Development height and gas drainage effect. After the length of the filling section is more than 124m, the development degree of overburden fracture is not conducive to gas drainage. Finally, the length L 1 of the working face of the filling section is 120m, and the length of the working face of the traditional fully mechanized mining section is 98m. - The total length of the filling mixed mining face is 218m.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Abstract

一种综采-充填混合开采工作面（11）充填段长度（ L 1）确定方法，首先，根据矿井生产能力要求，确定综采-充填混合工作面总长度（ L），然后，根据岩石保护层工作面（10）每天矸石产矸量与综采-充填混合工作面充填段采空区充入的充填物料质量相等的原理，初步确定充填段工作面长度范围，最后，根据现场综采-充填混合开采工作面覆岩裂隙发育及岩层移动特征需求，最终确定充填段工作面长度。本确定方法简单、实用，可为综采-充填混合开采技术的推广应用提供工程技术指导，进一步促进煤矿井下矸石不升井，洗选矸石回填采空区，高效充填采煤的"采选充采"一体化绿色开采循环模式，扩大充填采煤的推广应用范围。

Description

综采-充填混合开采工作面充填段长度确定方法 技术领域
本发明涉及充填采煤技术领域，特别是一种适用于综采-充填混合开采工作面充填段长度确定方法。
背景技术
近年来，固体充填采煤技术作为一种解放“三下”压煤的煤矿绿色开采技术已在我国多个矿区地得到了推广及应用，成功解放了大量煤炭资源，同时井下矸石不升井，减少地面矸石堆放及污染绿色理念进一步加强，越来越多的矿区采用井下洗选煤技术，实现井下矸石洗选，洗选矸石回填采空区的绿色循环开采一体化技术。然而随着煤矿资源的高强度开采，很多煤矿在下阶段煤层延伸开采时，遇到低渗透高瓦斯突出危险煤层，此类煤层的开采具有安全危险性，且煤层开采成本高，严重影响了矿井服务年限。因此，开采上岩石保护层，预抽被保护煤层瓦斯，岩石保护层矸石作为充填材料回填到被保护层采空区内，实现矸石不升井，煤与瓦斯共采为目的技术应运而生，此技术中考虑到矿井产量及瓦斯抽放效果，被保护层采用综采-充填混合工作面开采。
合理设计综采-充填混合开采工作面充填段长度对于井下矸石的及时处理、充填采煤的顺利实施，瓦斯抽放效果等具有重要的影响作用。因此，研究一种综采-充填混合开采工作面充填段长度确定方法，成为类似条件下综采-充填混合开采不可否缺的研究手段与研究方法，具有重要的现实意义与广阔的应用前景。
发明内容
本发明的目的是针对已有技术中存在的问题，提供一种方法简单、安全可靠、工程应用性强的综采-充填混合开采工作面充填段长度确定方法。
本发明的综采-充填混合开采工作面充填段长度确定方法：首先，根据矿井生产能力需求设计混合工作面总长度，然后，根据岩石保护层工作面每天矸石产矸量与综采-充填混合开采工作面充填段采空区充入的充填物料质量相等的原理，初步设计综采-充填混合开采工作面充填段长度范围，最后，根据现场混合开采工作面覆岩裂隙发育及岩层移动特征需求，确定充填段工作面长度。
所述岩石保护层开采每天矸石出矸量由下式得出：
M2＝μv2L2Hyη        (1)
式中：
M2─岩石保护层每天产矸量，t/日；
μ─矸石井下洗选率，％；
v2─保护层工作面每天推进度，m/日，由采煤机截齿和割煤次数决定；
L2─保护层回采工作面面长，m，由瓦斯抽放钻孔长度决定；
Hy─保护层回采工作面岩层高度，m，由底板裂隙发育深度决定；
η─岩石密度，t/m3。
所述综采-充填混合开采工作面充填段充入的充填物料由下式得到：
M1＝v1L1ctH1ctηc          (2)
式中：
M1─综采-充填混合开采工作面每天耗矸量，t/日；
v1─综采-充填混合开采工作面每天推进度，m/日，由年产量决定；
L1ct─综采-充填混合开采工作面充填段长度，m，由产矸量和刮板输送能力决定；
H1ct─可充填高度，m，由输送机悬挂高度和顶板提前下沉量决定；
ηc─松散矸石视密度，t/m3。
所述初步设计综采-充填混合开采工作面充填段长度范围根据M1≥M2，联立式公式(1)和(2)，得出综采-充填混合开采工作面充填段长度L1ct范围为：
Figure PCTCN2016106335-appb-000001
所述充填段工作面长度根据现场工作面覆岩裂隙发育及岩层有移动特征确定。
有益效果：本发明综采-充填混合开采工作面开采充填段长度，是分析和设计综采-充填混合开采技术中的一个重要参数之一。通过确定综采-充填混合开采工作面总长度，再根据岩石保护层开采每天矸石产矸量与综采-充填混合开采工作面充填段充入的充填物料质量相等的原理，初步确定充填段工作面长度范围，再根据现场综采-充填混合开采工作面覆岩裂隙发育及岩层移动特征需求，最终确定充填段工作面长度。其方法简单实用，可为综采-充填混合开采技术的推广应用提供工程技术指导，进一步促进煤矿井下矸石不升井，洗选矸石回填采空区，高效充填采煤的“采选充采”一体化绿色开采循环模式，扩大充填采煤的推广应用范围。由于可以合理、准确地设计综采-充填混合开采工作面充填段长度，从而可以为类似条件下综采-充填混合开采工作面充填段长度提供理论确定方法。该方法简单易行，试验效果好，具有极强的工程实用性与使用价值。
附图说明
图1为综采-充填混合开采工作面充填段长度方法设计流程图。
图2为综采-充填混合开采工作面平面布置图。
图3为保护层工作面与综采-充填混合开采工作面采煤原理图。
图中：1-自移式转载机，2-充填带式输送机，3-刮板输送机，4-底卸式输送机，5-卸料孔，6-充填液压支架，7-采煤机，8-运矸巷，9-运煤巷，L1-充填段工作面长度，L2-垮落段工作面长度，L-综采-充填混合工作面总长度，10-岩石保护层工作面，11-综采-充填混合开采工作面。
具体实施方式
下面结合附图中的实施例对本发明作进一步的描述：
如图1和图3所示，本发明的综采-充填混合开采工作面11充填段长度L1确定方法，首先根据采矿地质条件确定矿井采煤参数，再根据矿井生产能力，设计综采-充填混合开采工作面11总长度L，然后，根据岩石保护层工作面10每天矸石产矸量与综采-充填混合开采工作面11充填段每天矸石消耗量，根据保护层工作面与综采-充填混合开采工作面充填物料质量相等的原理，初步确定综采-充填混合开采工作面11充填段长度L1范围，最后，根据现场综采-充填混合开采工作面11覆岩裂隙发育高度及瓦斯抽放效果，确定综采-充填混合开采工作面11的充填段长度L1；具体步骤如下：
1.根据矿井生产能力需求设计综采-充填混合开采工作面11的总长度L；
2.由下式计算出岩石保护层工作面10每天矸石出矸量：
M2＝μv2L2Hyη          (1)
式中：
M2─岩石保护层每天产矸量，t/日；
μ─矸石井下洗选率，％；
v2─保护层工作面每天推进度，m/日，由采煤机截齿和割煤次数决定；
L2─保护层回采工作面面长，m，由瓦斯抽放钻孔长度决定；
Hy─保护层回采工作面岩层高度，m，由底板裂隙发育深度决定；
η─岩石密度，t/m3。
3.由下式计算出综采-充填混合开采工作面11的充填段长度L1充入的充填物料量：
M1＝v1L1ctH1ctηc         (2)
式中：
M1─综采-充填混合开采工作面每天耗矸量，t/日；
v1─综采-充填混合开采工作面每天推进度，m/日，由年产量决定；
L1ct─综采-充填混合开采工作面充填段长度，m，由产矸量和刮板输送能力决定；
H1ct─可充填高度，m，由输送机悬挂高度和顶板提前下沉量决定；
ηc─松散矸石视密度，t/m3。
4.根据质量守恒原理，综采-充填混合开采工作面11充填量与岩石保护层工作面10产矸量M1≥M2关系，计算综采-充填混合开采工作面11长度，结合式公式(1)和(2)，得出综采-充填混合开采工作面11充填段长度L1范围为：
Figure PCTCN2016106335-appb-000002
5.根据现场综采-充填混合开采工作面11覆岩裂隙发育及瓦斯抽采效果需求，确定适合的充填段工作面长度L1。
实施例1：某矿己15煤层为低渗透气性高瓦斯煤层，煤层厚度为3.2m，上保护煤层己14煤层平均厚度0.5m，距离己15煤层13.5m，该矿井设计保护层工作面长度150m，采高为1.9m，采1.4m岩石层，预抽被保护层煤层瓦斯，矸石回填被保护层充填段采空区。被保护层工作面长度218m，采用综采-充填混合工作面开采。其中综采-充填混合工作面开采充填段长度设计步骤如下：
1、己14-31050工作面每天出矸量的计算式：
M2＝μv2L2Hyη           (1)
式中：
M2─己14-31010面每天产矸量，t/日；
μ─矸石井下洗选率，65％～100％；
v2─每天推进度，2.4m/日；
L2─工作面面长，150m；
Hy─岩层高度，1.4m；
η─岩石密度，2.4t/m3。
2、己15-31010工作面需消耗最少矸石量计算式：
M1＝v1L1H1ηc            (2)
式中：
M1─己15-31010工作面每天耗矸量，t/日；
v1─己15-31010工作面每天推进度，2.4m/日；
L1─工作面充填段长度，m；
H1─可充填高度，2.3m；
ηc─松散矸石视密度，1.85t/m3
根据设计要求，己15-31010工作面需消耗大于己14-31010工作面每天出矸量，即：M1≥M2；
联立式公式(1)～(2)，则己15-31010工作面充填段长度H1表达式：
Figure PCTCN2016106335-appb-000003
矸石洗选率按90％计算，带入以上计算，得出综采-充填混合开采工作面充填段长度L1ct最小为106m，结合多孔底卸式输送机的现场应用情况，及现场覆岩裂隙发育高度及瓦斯抽放效果，充填段长度大于124m以后，覆岩裂隙发育程度不利于瓦斯抽采，最终确定充填段工作面长度L1为120m，传统综采段工作面长度为98m，综采-充填混合开采工作面总长度218m。

Claims (5)

  1. 一种综采-充填混合开采工作面充填段长度确定方法，其特征在于：首先，根据矿井生产能力需求设计综采-充填混合工作面总长度，然后，根据岩石保护层工作面每天矸石产矸量与综采-充填混合开采工作面充填段采空区充入的充填物料质量相等的原理，初步设计综采-充填混合开采工作面充填段长度范围，最后，根据现场综采-充填混合开采工作面覆岩裂隙发育及岩层移动特征需求，确定充填段工作面长度。
  2. 根据权利要求1所述的综采-充填混合开采工作面充填段长度确定方法，其特征在于：所述岩石保护层开采每天矸石出矸量由下式得出：
    M2＝μv2L2Hyη   (1)
    式中：
    M2─岩石保护层每天产矸量，t/日；
    μ─矸石井下洗选率，％；
    v2─保护层工作面每天推进度，m/日，由采煤机截齿和割煤次数决定；
    L2─保护层回采工作面面长，m，由瓦斯抽放钻孔长度决定；
    Hy─保护层回采工作面岩层高度，m，由底板裂隙发育深度决定；
    η─岩石密度，t/m3。
  3. 根据权利要求1所述的综采-充填混合开采工作面充填段长度确定方法，其特征在于：所述综采-充填混合工作面充填段充入的充填物料由下式得到：
    M1＝v1L1ctH1ctηc   (2)
    式中：
    M1─综采-充填混合开采工作面每天耗矸量，t/日；
    v1─综采-充填混合开采工作面每天推进度，m/日，由年产量决定；
    L1ct─综采-充填混合开采工作面充填段长度，m，由产矸量和刮板输送能力决定；
    H1ct─可充填高度，m，由输送机悬挂高度和顶板提前下沉量决定；
    ηc─松散矸石视密度，t/m3。
  4. 根据权利要求1所述的综采-充填混合开采工作面充填段长度确定方法，其特征在于：所述初步设计综采-充填混合开采工作面充填段长度范围根据M1≥M2，联立式公式(1)和(2)，得出综采-充填混合开采工作面充填段长度L1ct范围为：
    Figure PCTCN2016106335-appb-100001
  5. 根据权利要求1所述的综采-充填混合开采工作面覆岩裂隙发育及岩层移动特征需求，其特征在于：所述充填段工作面长度根据现场工作面覆岩裂隙发育及岩层有移动特征确定。
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