摘要
以综采采场上覆岩层运动规律为核心,运用"传递岩梁"理论对采场顶板运动参数进行预计算,建立了采场顶板结构模型,详细分析了支架在"给定变形"和"限定变形"两种工作状态下支护强度和活柱缩量的计算确定方法。研究结果表明:直接顶由多分层组成时,具有不同运动组合特性的各分层垮落步距不同。将对采场矿压显现有明显影响的基本顶岩梁分为"单一岩梁"和"双岩梁"结构。采场顶板控制设计中对直接顶采用"给定载荷"的工作方式,根据不同的控顶要求对基本顶采用"给定变形"或"限定变形"的工作方式。在基本顶"双岩梁"结构下,既要防止下位岩梁运动时的切顶、活柱缩量超限等威胁,又要防止上位岩梁来压时对采场的动压冲击。
With overlying strata movement law at fully-mechanized coal mining face as the core, the roof movement parameters were predicated and calculated by using the ＂transferring beam＂ theory and a roof structure model of fully-mechanized coal mining face was established to analyze the calculation method of support strength and shrink- age under the working conditions of ＂given deformation＂ and ＂limited deformation＂. The results show that when the immediate roof is composed of multiple layers, the caving step distances of layers with different movement character- istics are different. The main roof, which had obvious influence on the stope pressure, was divided into ＂single rock beam＂ structure and ＂double rock beam＂ structure. The ＂given load＂ working method was adopted in the roof con- trol design of immediate roofs and methods of ＂given deformation＂ or ＂limited deformation＂ were used in main roof according to different control requirements. In the main roof with ＂double rock beam＂ structure, threats such as the overrun of cutting and live column shrinkage during the movement of lower rock beam as well as the dynamic impact on the stope when pressure came to the upper rock beam had to be prevented.
出处
《山东科技大学学报（自然科学版）》
CAS
2016年第4期44-51,共8页
Journal of Shandong University of Science and Technology(Natural Science)
关键词
综采采场
传递岩梁
顶板结构模型
支架-围岩关系
fully-mechanized coal mining face
transferring beam
roof structure model
support-surrounding rock relationship
