Influence of strata characteristics on face support requirement for roof control in longwall workings - a case study

被引：11
|
作者：
Singh, G. S. P. [1 ]
Singh, U. K. [2 ]
机构：
[1] IT BHU, Dept Min Engn, Varanasi 221005, Uttar Pradesh, India
[2] ISM Univ, Dept Min Engn, Dhanbad 826004, Bihar, India
来源：
TRANSACTIONS OF THE INSTITUTIONS OF MINING AND METALLURGY SECTION A-MINING TECHNOLOGY | 2012年 / 121卷 / 01期
关键词：
Longwall; Numerical modelling; Roof strata; Failure mechanism; Face control; Support capacity;
D O I：
10.1179/174328611X13061613463896
中图分类号：
TD [矿业工程];
学科分类号：
0819 ;
摘要：
A proper understanding of the influence of strata characteristics on progressive caving behaviour and support performance is essential for reliable planning, rational support selection and safe operation of longwall faces. This paper reports numerical modelling results to explain the influence of roof characteristics on strata behaviour and adequacy of support during face advance in three different conditions. The study reveals that although the field support of a given capacity was adequate to work bottom section under general roof formation, it needed to be used in conjunction with a rapid yield valve (RYV) having a peak discharge capacity of 470 L min(-1) and a response time of 52 ms for safe extraction of top section working. A safe and smooth extraction of the bottom section longwall panels under hard roof formation required higher capacity support in conjunction with an RYV for safe management of en masse caving under prevailing strata conditions.
引用
收藏
页码：11 / 19
页数：9
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