摘要
隐伏火烧区是矿井煤层安全开采的主要威胁之一,探明隐伏火烧区位置和致灾机理对矿井水害防治具有重要意义。为探明柠条塔煤矿隐伏火烧区分布形态,采用物探、钻探等多种技术综合勘探了柠条塔煤矿1^(-2上)煤层隐伏火烧区,采用富水指数法预测了火烧区富水性分区,采用数值模拟预测了2^(-2)煤层开采导水裂缝带高度。结果表明:隐伏火烧区面积为1.45 km~2,火烧区西部边界、西侧火烧区南、北部边界和东侧南部边界精度在50 m以内,火烧区东部边界、东侧火烧区北部边界精度在100 m以内;利用风化基岩单位涌水量、烧变岩单位涌水量、视电阻率、SNMR含水率和SNMR渗透系数等作为富水性评价指标,火烧区富水性明显高于周边地层;2^(-2)煤层开采后导水裂缝带会波及到火烧区底板隔水层,导致火烧积水区向矿井充水,且有直接充水和间接充水两种形式;提出了分段注浆、清污分流、综合利用等隐伏火烧区防灾减灾措施。
The hidden burning area is one of the main threats to safe seam mining,so it is of great significance to clarify the location and disaster mechanism of hidden burning area for the prevention and control of coal mine water hazards.In order to explore the distribution pattern of hidden burning area in the Ningtiaota Coal Mine,geophysical prospecting,drilling and other techniques are used to comprehensively explore the distribution of the hidden burning area in upper 1^(-2) coal seam of Ningtiaota Coal Mine.Water-richness index method is used to predict water yield property zone,and numerical modeling is used to predict the height of water-conducting fracture zone of 2^(-2) colseam.The results show that the area of the hidden burning area is 1.45 km~2,the accuracies of the western border,the southern and northern border of the west side,the northern border and the southern border of the east side of the burning area are within 50 m,the accuracies of the eastern border and the northern border of the east side of the burning area are within 100 m.Unit water inflow of weathered bedrock,unit water inflow of burnt rock,apparent resistivity,SNMR water content and SNMR permeability coefficient are used as the evaluation index,and the results show that the water content in burning area is better than that of surrounding strata.The water-conducting fracture zone could affect the floor water-resisting layer of the burning area after the mining of 2^(-2 )coal seam,which causes the burning area to charge water to the mine with two main forms of direct water filling and indirect water filling.The disaster prevention and control measures for hidden burning area including sectional grouting,sewage diversion and comprehensive utilization are put forward.
作者
高利军
王鹏翔
李尚杰
寇规规
郭亮亮
GAO Lijun;WANG Pengxiang;LI Shangjie;KOU Guigui;GUO Liangliang(Shaanxi Coal and Chemical Industry Group Ningtiaota Mining Co.,Ltd.,Yulin,Shaanxi 719300,China;Shaanxi No.185 Coalfield Geology Co.,Ltd.,Yulin,Shaanxi 719000,China;School of Water and Environment,Chang'an University,Xi'an,Shaanxi 710054,China)
出处
《中国煤炭》
2022年第S02期101-109,共9页
China Coal
基金
陕西省自然科学基础研究计划-陕煤联合基金重点项目(2019JLZ-03)
陕西煤业化工集团重点科研项目(2020SMHKJ-B-J-27)。
关键词
隐伏火烧区
烧变岩
水害防治
三维地震
致灾机理
hidden burning area
burnt rock
water hazard prevention and control
3D seismic
disaster-causing mechanism
