
第43卷第4期 2016年8月
矿业安全与环保
MINING SAFETY & ENVIRONMENTAL PROTECTION
刘思利,吴士良,越吉玉.采场上位高强度案动压控制设计[J].矿业安全与环保,2016,43(4):45-48 文章编号:10084495(2016)04004504
采场上位高强度岩梁动压控制设计
刘思利,昊士良,赵吉玉
(山东科技大学矿业与安全工程学院,山东青岛266590)
Vol. 43 No. 4 Aug. 2016
摘要:为防止采场上位高强度岩梁来压时的动压冲击,以某矿3101工作面为研究对象,运用“传递岩梁"理论,利用实测矿压参数对基本顶“双岩梁”结构的下位岩梁进行“限定变形”的控制设计,以保证上位高强度岩梁来压前夕使下位岩梁与之紧贴,减小动压冲击。研究结果表明:支架支护强度为 0.2795MPa时,既能保证初次来压期间和周期来压期间采场不受基本顶上位高强度岩梁的动压冲击,又能满足支架活柱缩量不超限的要求。
关键词:上位高强度岩梁;下位岩梁;动压冲击;限定变形;控制设计
中图分类号:TD323
文献标志码:B
网络出版时间:2016-08-0315:30
网络出版地址:http://www.cnki.net/kems/detail/50.1062.TD.20160803.1530.022.html
Control Design of Dynamic Pressure of Upper High-strength Rock Beam in Stope
LIU Sili, WU Shiliang, ZHAO Jiyu
( School of Mining and Sqfety Engineering, Shandong Unieersity of Science and Technology, Qingdao 266590, China)
Abstract : In order to prevent the dynamic pressure impact during the loading of the upper highstrength rock beam in the stope, the "limited deformation" control design for the lower rock beam of the main roof structure of " double rock beam" was conducted by taking 3101 coal mining face in a mine as the research object and using the theory of " transferring beam" and the measured underground pressure parameters so as to ensure the upper highstrength rock beam to be close to the lower rock beam before loading and decrease the dynamic pressure impact. The research results showed that when the supporting strength was 0. 279 5 MPa, it can not only guarantee that the stope might not be affected by the dynamic pressure impact of the upper high-strength rock beam of the main roof during the first and periodic weighting, but also meet the requirements that the yield of the support prop was not overrun.
[ouon uoeap pa ed aanssaadaeuap eag o sao o ansery addn spromgay design
采场基本顶岩梁分为“单一岩梁”和“多岩梁” 结构,当基本顶由“多岩梁"组成时,支架能够承受下位岩梁运动作用于其上的载荷,如果存在强度较高、坚硬的上位岩梁,其显著运动时会在短时间内给支渠以巨大的冲击载荷,造成支渠的折损基至发生恶性顶板事故()。科学的项板控制设计是解决采场上位高强度岩染动压冲击的关键。针对具体的采场项板控制而言,项板控制设计就是在分析具体煤层地质条件的基础上,预计顶板运动规律,确定合理的支
收稿日期:20151027;201605-17修订
作者简介:刘思利(1991一),男,山东济宁人,硕士研究生,研究方向为矿山压力与岩层控制。E-mail:liusili300@ 163.com。
架一围岩关系2]。合理的支架一围岩关系核心是确定合理的支架支护强度。合理的支护强度应使支架一围岩处于相对平衡状态,应使项板下沉控制在一定范围内,当工作面处于最危险状态下,仍能使项板状况保持良好。笔者运用“传递岩”理论,利用“位态方程"[3]对基本顶“双岩梁"结构的上位高强度岩梁进行动压控制设计,以达到采场具有合理的
支护强度和活柱下缩量不超限的要求。 1工作面概况
某矿3101工作面回采31煤层,平均煤厚 2.0m,煤层倾角1°~3°,煤层结构简单。31煤层总体为一向西南倾斜的近水平产状的单斜构造,局部发育小断层、裂隙或小的负载构造。3101工作面回采
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