| 切顶卸压自成巷技术在浅埋中厚煤层开采中的应用 |
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| 引用本文： | 杨晓杰,孙跃,王二雨,毛文彬,舒昱,彭文雨.切顶卸压自成巷技术在浅埋中厚煤层开采中的应用[J].中国矿业,2019,28(7). |
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| 作者姓名： | 杨晓杰 孙跃 王二雨 毛文彬 舒昱 彭文雨 |
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| 作者单位： | 中国矿业大学（北京）,中国矿业大学（北京）,中国矿业大学（北京）,中国矿业大学（北京）,中国矿业大学（北京）,中国矿业大学（北京） |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 基于岩体碎胀特性是切顶卸压沿空留巷技术切顶参数计算和设计的关键,本文以哈拉沟煤矿12201工作面为工程背景,通过现场实测、理论分析等方法对采空区矸石碎胀特性及控制技术进行研究。现场实测表明:采空区顶板从垮落、压实到稳定,经历了三个过程,确定了每个过程的影响范围与时间效应,准确地测出采空区顶板稳定后的碎胀系数k为1.35～1.40,确定了切顶深度6m的合理性。通过建立冒落矸石稳定后力学模型,揭示了冒落矸石与留巷巷内支护的协同作用原理,提出了在工作面支架后挡矸装置采用由11#工字钢、金属网以及单体液压支柱联合而成体系进行支护,最后取得了良好的成巷效果。
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| 关 键 词： | 无煤柱留巷 切顶参数 碎胀特性 协同作用 挡矸支护 |
| 收稿时间： | 2018/6/17 0:00:00 |
| 修稿时间： | 2019/6/26 0:00:00 |
Application of gob-side entry retaining formed by roof cutting and pressure release in shallow-buried medium-thick seam mining |
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| yangxiaojie,sunyue,wangeryu,maowenbin,shuyu and pengwenyu.Application of gob-side entry retaining formed by roof cutting and pressure release in shallow-buried medium-thick seam mining[J].China Mining Magazine,2019,28(7). |
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| Authors: | yangxiaojie sunyue wangeryu maowenbin shuyu and pengwenyu |
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| Affiliation: | China University of Mining and Technology(Beijng),China University of Mining and Technology(Beijng),China University of Mining and Technology(Beijng),China University of Mining and Technology(Beijng),China University of Mining and Technology(Beijng),China University of Mining and Technology(Beijng) |
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| Abstract: | Based on the rock mass broken expand characteristics, it is the key to the calculation and design of the roof cut parameters of gob-side entry retaining technology. Taking the 12201 working face of Halagou Coal Mine as the engineering background, it was deduced by field measurement and theoretical analysis. Methods To study the broken expand characteristics and control technology of gangue in the goaf. The on-site measurement shows that the roof of the goaf has undergone three processes from fall, compaction and stabilization, the impact scope and time effect of each process have been determined, and the broken expansion coefficient k after the stability of the roof in the goaf area has been accurately measured from 1.35 to 1.40, the rationality of the 6 m cut depth was determined. Through the establishment of the mechanical model after the stability of the caving gangue, the principle of synergistic action between falling gangue and roadway support in gob-side entry retaining is revealed, and the supporting system of the single hydraulic prop,11 type of I-steel and the reinforcing steel net is put forward, and the good effect of the roadway is achieved. |
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