| 综放工作面垮落带高度测定方法研究 |
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| 引用本文： | 张峰,车禹恒,题正义,秦洪岩,李佳臻.综放工作面垮落带高度测定方法研究[J].矿业安全与环保,2021(2):49-54. |
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| 作者姓名： | 张峰 车禹恒 题正义 秦洪岩 李佳臻 |
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| 作者单位： | 山西工程技术学院采矿工程系;中煤科工集团重庆研究院有限公司;辽宁工程技术大学矿业学院;华北科技学院安全工程学院 |
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| 基金项目： | 国家自然科学基金项目(51704148);山西省高等学校科技创新项目(2020L0724);山西工程技术学院校级科研项目(2021QD-01,20200040021)。 |
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| 摘 要： | 为解决高瓦斯矿井综放工作面垮落带高度难以精确测定,造成工作面两端头难维护、预抽钻孔终孔位置难以确定等问题,依据工作面采动后顶板岩层破断垮落、弯曲下沉对采空区煤层底板施加压力的情况,结合采空区上覆各岩层的厚度和密度,提出了垮落带发育高度的测定方法。以大平矿N1S2综放工作面为例,现场测试结果表明:利用该测定方法测得的垮落带高度为88.65 m,钻孔冲洗液法测得的垮落带高度为88.20 m,二者绝对误差仅为0.45 m。
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| 关 键 词： | 采空区 煤层底板压力 垮落带高度 测定方法 钻孔冲洗液法 |
Study on the determination method of the height of caving zone in fully mechanized caving face |
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| ZHANG Feng,CHE Yuheng,TI Zhengyi,QIN Hongyan,LI Jiazhen.Study on the determination method of the height of caving zone in fully mechanized caving face[J].Mining Safety & Environmental Protection,2021(2):49-54. |
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| Authors: | ZHANG Feng CHE Yuheng TI Zhengyi QIN Hongyan LI Jiazhen |
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| Affiliation: | (Department of Mining Engineering,Shanxi Institute of Technology,Yangquan 045000,China;CCTEG Chongqing Research Institute,Chongqing 400037,China;School of Mining,Liaoning Technical University,Fuxin 123000,China;School of Safety Engineering,North China Institute of Science and Technology,Beijing 101601,China) |
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| Abstract: | It is difficult to accurately determine the height of caving zone in fully mechanized caving face in gassy mine,resulting in difficult maintenance at both ends in working face and difficult to determine the location of final hole of pre-pumping borehole.In order to solve this problem,according to the variation process of the pressure exerted on the coal seam floor in goaf of the roof breaking and caving,bending and subsidence after the mining of the working face,combined with the thickness and density of the overlying strata in goaf,a method to determine the height of caving zone development was proposed.Taking N1S2 fully mechanized caving face of Daping Mine as an example,the field test results show that the height of caving zone measured by the determination method is 88.65 m,the height of the caving zone measured by the drilling flushing fluid method is 88.20 m,with the absolute error of only 0.45 m. |
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| Keywords: | goaf pressure of coal seam floor height of caving zone determination method drilling flushing fluid method |
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