WO2016041389A1 - 一种固体充填采煤工作面充填质量评价方法 - Google Patents

一种固体充填采煤工作面充填质量评价方法 Download PDF

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WO2016041389A1
WO2016041389A1 PCT/CN2015/081019 CN2015081019W WO2016041389A1 WO 2016041389 A1 WO2016041389 A1 WO 2016041389A1 CN 2015081019 W CN2015081019 W CN 2015081019W WO 2016041389 A1 WO2016041389 A1 WO 2016041389A1
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filling
solid
coal mining
quality
evaluation
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French (fr)
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张吉雄
李猛
张强
姜海强
薛松
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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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

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  • the invention relates to a quality evaluation method for filling coal mining face, in particular to a filling quality evaluation method suitable for solid filling coal mining face such as vermiculite and fly ash.
  • solid-filled coal mining technology directly fills solid waste such as surface vermiculite, fly ash and aeolian sand into the underground goaf, and controls the stope.
  • solid waste such as surface vermiculite, fly ash and aeolian sand into the underground goaf, and controls the stope.
  • the filling quality of solid-filled coal mining face is the key to the success of filling.
  • the method of effective evaluation so as to monitor the quality of the solid-filled coal face in real time, is of great significance to ensure the successful implementation of solid-filled coal mining.
  • the object of the present invention is to provide a simple and accurate method for evaluating the filling quality of a solid-filled coal mining face in view of the problems existing in the prior art.
  • the purpose of the solid-filled coal mining application includes coal mining under construction structures, coal mining under water bodies, compaction and filling of strips, solid waste treatment, and room-type coal pillar recovery;
  • the controlled objects include building deformation levels and overlays.
  • the range of rock fissure development, coal mining volume, solid waste treatment capacity, roof stability, different application purposes correspond to different control objects;
  • the evaluation indicators include surface deformation value, water guiding fracture zone height, recovery rate, filling amount And the enrichment rate, different control objects correspond to different evaluation indicators;
  • the filling work surface filling quality evaluation result is to divide the working surface filling quality into two levels: up to standard and not up to standard; if all evaluation indicators meet the respective requirements of compliance, The quality of the working surface filling is up to standard, otherwise it will not meet the standard.
  • the present invention Due to the adoption of the above technical solution, the present invention only needs to determine the evaluation index according to the control object under different filling purposes in actual application, and can evaluate the filling working surface by monitoring the actual value of the evaluation index of the coal mining face in real time. quality.
  • the invention can provide reference for the effective evaluation of the filling quality of the solid filling coal mining face, and is of great significance for ensuring the successful implementation of the solid filling coal mining. It is especially suitable for evaluation of filling quality evaluation of solid-filled coal mining face such as vermiculite and fly ash.
  • the method is simple and easy, saves time and labor, and has good effect. It has wide practicality in the technical field.
  • FIG. 1 is a flow chart of a method for evaluating the filling quality of a solid-filled coal mining face according to the present invention.
  • the method for evaluating the filling quality of the solid-filled coal mining face of the present invention evaluates the filling quality of the filling coal mining face by comparing and analyzing the theoretical and actual values of the evaluation indexes of different solid filling mining applications. Specific steps are as follows:
  • Embodiment 1 Taking a coal mining face of a coal mine CT101 as an example, the specific implementation steps are as follows:
  • the CT101 working face of the coal mine is located under the fourth aquifer.
  • the purpose of the application is to mine coal under water.
  • the mining of coal seam is seriously affected by the “four-inclusive”.
  • the development range of the overlying fracture is selected as the control object. Therefore, it is necessary to strictly control the development range of the overburden fractures in the stope;
  • the height of the water-conducting fracture zone is selected as the evaluation index of the filling quality of the working face
  • the height of the water-conducting fracture zone of the overburden rock is monitored by the drilling flushing method.
  • the maximum height of the water-conducting fracture zone is 10.5m, which is less than the theoretical value of the evaluation index of the filling coal mining.
  • the safe mining of coal seams, so the filling quality of the solid filling coal mining face is up to standard.
  • Example 2 Taking a coal mining face of a coal mine 1312 as an example, the specific implementation steps are as follows:
  • the 1312 working face of the coal mine is located under the building, mainly for brick-concrete structure.
  • the purpose of the application is to mine coal under the building.
  • the deformation level of the building is selected as the control object.
  • the deformation of the surface building must be strictly controlled;
  • the surface deformation value is selected as the evaluation index of the filling quality of the working surface
  • the fortification standards for the fortification standards of the ground building (structure) are: the mining impact control of the building (structure) such as the ground village is within the influence range of the Class I mining
  • the maximum surface subsidence of the building area is controlled within 250mm
  • the maximum horizontal deformation of the surface is controlled within 1.0mm/m. Therefore, it is necessary to ensure that the surface deformation value of the mining face after mining is within the influence range of Class I mining, and determine the theoretical value of the evaluation index: the maximum sinking amount is 250 mm, and the maximum horizontal deformation is 1.0 mm/m;
  • the maximum sinking value of the top surface is 163mm
  • the maximum tensile deformation of the surface is 0.4mm/m
  • the maximum deformation of the surface is 0.7mm/m
  • the maximum inclination of the ground is 0.7mm. /m.
  • the surface subsidence values of all village buildings are less than 250mm fortification standards; the maximum deformation value of each village surface is much smaller than the critical deformation value of general brick-concrete structure bungalows, and the impact damage on various buildings is in the I-level range. It will not affect the normal use of various types of buildings (structures) on the ground. Therefore, the actual value of the evaluation index is less than the theoretical value of the filling coal mining evaluation index to ensure the safe mining of the coal seam under the building, so the filling quality of the solid filling coal mining face is up to standard.

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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)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

一种固体充填采煤工作面充填质量评价方法，首先由固体充填采煤应用目的确定固体充填采煤控制对象；其次根据控制对象选取不同充填开采目的下相应的评价指标；然后由工作面工程地质参数及控制对象，确定各项评价指标理论要求范围；最后将评价指标理论值与实际值进行对比分析，得出充填工作面质量评价结果。此方法为固体充填采煤工作面充填质量有效地评价提供参考，对确保固体充填采煤的成功实施具有重要意义，特别适用于矸石、粉煤灰等固体充填采煤工作面充填质量评价。

Description

一种固体充填采煤工作面充填质量评价方法 技术领域
本发明涉及一种充填采煤工作面质量评价方法，特别是一种适用于矸石、粉煤灰等固体充填采煤工作面充填质量评价方法。
背景技术
固体充填采煤技术作为一种我国自主研发的、能够与环境协调发展的绿色开采技术，将地面矸石、粉煤灰、风积沙等固体废弃物直接充填至井下采空区，在控制采场覆岩移动及地表沉陷的基础上，达到置换建(构)筑物下、水体下、铁路下(三下)压煤、保护地表建筑物及矿区生态环境的目的，有效兼顾了煤矿开采的经济效益与环境效益，获得了广泛的关注及较大规模的推广应用。固体充填采煤工作面充填质量是关系充填成败的关键，目前关于固体充填采煤工作面充填质量还没有一种有效的评价方法，因此，亟需提出一种对固体充填采煤工作面充填质量有效评价的方法，从而实时监测固体充填采煤工作面质量状况，为确保固体充填采煤成功实施具有重要意义。
发明内容
技术问题：本发明的目的是针对现有技术中存在的问题，提供一种评价方法简单、准确的固体充填采煤工作面充填质量评价方法。
技术方案：本发明的固体充填采煤工作面充填质量评价方法，通过对比分析不同固体充填开采目的下的评价指标理论值与实际值来评价充填采煤工作面的充填质量，其具体步骤如下：
(1)由固体充填采煤的应用目的确定固体充填采煤所控制的对象；
(2)根据确定的控制对象选取不同充填开采目的下对应的评价指标；
(3)由工作面工程地质参数及控制对象，确定各项评价指标的理论要求范围；
(4)将评价指标理论值与实际值进行对比分析，得出充填工作面充填质量评价结果。
所述的固体充填采煤应用目的包括建构筑物下采煤、水体下采煤、条带变密实充填、固体废弃物处理、房式煤柱回收；所述的控制对象包括建筑物变形级别、覆岩裂隙发育范围、采煤量、固体废弃物处理能力、顶板稳定性，不同的应用目的对应不同的控制对象；所述的评价指标包括地表变形值、导水裂隙带高度、回采率、充填量、充实率，不同的控制对象对应不同的评价指标；所述充填工作面充填质量评价结果是将工作面充填质量分为达标、不达标两个等级；若所有评价指标均满足各自达标要求，则工作面充填质量达标，否则，不达标。
有益效果：由于采用了上述技术方案，本发明在实际运用时只需根据不同充填目的下的控制对象确定其评价指标，通过实时监测充填采煤工作面评价指标实际值，即可评价充填工作面质量。本发明能为固体充填采煤工作面充填质量有效地评价提供参考，对确保固体充填采煤的成功实施具有重要意义。特别适用于矸石、粉煤灰等固体充填采煤工作面充填质量评价其评价，其方法简单易行，省时省力，效果好，在本技术领域内具有广泛的实用性。
附图说明
图1为本发明固体充填采煤工作面充填质量评价方法流程图。
具体实施方式
下面结合附图对本发明的实施例作进一步的描述：
如图1所示，本发明的固体充填采煤工作面充填质量评价方法，通过对比分析不同固体充填开采应用目的下的评价指标理论值与实际值来评价充填采煤工作面的充填质量，其具体步骤如下：
(1)由固体充填采煤应用目的，如建构筑物下采煤、水体下采煤、条带变密实充填、固体废弃物处理、或房式煤柱回收，确定固体充填采煤控制对象，如建筑物变形级别、覆岩裂隙发育范围、采煤量、固体废弃物处理能力、或顶板稳定性；
(2)根据控制对象选取不同充填开采目的下相应的评价指标，如地表变形值、导水裂隙带高度、回采率、充填量、或充实率；
(3)由工作面工程地质参数及控制对象，确定各项评价指标理论要求范围；
(4)将评价指标理论值与实际值进行对比分析，得出充填工作面充填质量评价结果。若所有评价指标均满足各自达标要求，则工作面充填质量达标，否则，不达标。
实施例1、以某煤矿CT101充填采煤工作面为例，具体实施步骤如下：
(1)该煤矿CT101工作面位于第四含水层下，应用目的为水体下采煤，煤层开采受“四含”影响严重，为保证工作面的安全开采，选取覆岩裂隙发育范围为控制对象，因此，需严格控制采场覆岩裂隙发育范围；
(2)为防止工作面开采后覆岩裂隙波及第四含水层，选取导水裂隙带高度作为该工作面充填质量的评价指标；
(3)由于第四含水层直接覆盖于基岩地层之上，下方无隔水层，CT101工作面煤层距第四含水层最近为25.6m，因此，需保证充填采煤工作面导水裂隙带高度小于煤层距第四含水层最小距离，确定评价指标理论值为25.6m；
(4)CT101工作面开采后，采用钻孔冲洗液法对覆岩导水裂隙带高度进行监测，实测得到导水裂隙带最大高度为10.5m，小于充填采煤评价指标理论值，保证水体下煤层的安全开采，所以该固体充填采煤工作面充填质量达标。
实施例2、以某煤矿1312充填采煤工作面为例，具体实施步骤如下：
(1)该煤矿1312工作面位于建筑物下，主要为砖混结构的建筑物，应用目的为建筑物下采煤，为保证工作面的安全开采，选取建筑物变形级别为控制对象，因此，需严格控制地表建筑物的变形；
(2)为防止工作面开采后地表下沉值过大，选取地表变形值作为该工作面充填质量的评价指标；
(3)根据充填区域地面村庄建筑物情况，地面建(构)筑物的设防标准的设防标准是：地面村庄等建(构)筑物区域的采动影响控制在I级采动影响范围内，建筑物区域地表最大下沉量控制在250mm以内，地表最大水平变形控制在1.0mm/m以内。因此，需保证充填采煤工作面开采后地表变形值在I级采动影响范围内，确定评价指标理论值：最大下沉量250mm、最大水平变形1.0mm/m；
(4)1312工作面开采后，采上方地表的最大下沉值为163mm，地表拉伸变形最大值为0.4mm/m，地表压缩变形最大值为0.7mm/m，地表倾斜最大值为0.7mm/m。所有村庄建筑群的地表下沉值均小于250mm设防标准；各村庄地表最大变形值均远小于一般砖混结构平房的临界变形值，对各类建筑物的采动损害影响均在I级范围内，不会影响地面各类建(构)筑物的正常使用。因此，评价指标实际值小于充填采煤评价指标理论值，保证建筑物下煤层的安全开采，所以该固体充填采煤工作面充填质量达标。

Claims (5)

  1. 一种固体充填采煤工作面充填质量评价方法，其特征在于：通过对比分析不同固体充填开采目的下的评价指标理论值与实际值来评价充填采煤工作面的充填质量，其具体步骤如下：
    (1)由固体充填采煤的应用目的确定固体充填采煤所控制的对象；
    (2)根据确定的控制对象选取不同充填开采目的下对应的评价指标；
    (3)由工作面工程地质参数及控制对象，确定各项评价指标的理论要求范围；
    (4)将评价指标理论值与实际值进行对比分析，得出充填工作面充填质量评价结果。
  2. 根据权利要求1所述的一种固体充填采煤工作面充填质量评价方法，其特征在于：所述的固体充填采煤的应用目的包括建构筑物下采煤、水体下采煤、条带变密实充填、固体废弃物处理、或房式煤柱回收。
  3. 根据权利要求1所述的一种固体充填采煤工作面充填质量评价方法，其特征在于：所述的控制对象包括建筑物变形级别、覆岩裂隙发育范围、采煤量、固体废弃物处理能力、顶板稳定性，不同的应用目的对应不同的控制对象。
  4. 根据权利要求1所述的一种固体充填采煤工作面充填质量评价方法，其特征在于：所述的评价指标包括地表变形值、导水裂隙带高度、回采率、充填量、充实率，不同的控制对象对应不同的评价指标。
  5. 根据权利要求1所述的一种固体充填采煤工作面充填质量评价方法，其特征在于：所述充填工作面充填质量评价结果是将充填工作面充填质量分为达标、不达标两个等级；若所有评价指标均满足各自达标要求，则充填工作面充填质量达标，否则，不达标。
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