Assessment of pot-hole subsidence risk for Indian coal mines

作     者：Lokhande D.Ritesh Murthy Vemavarapu M.S.R. Vellanky Venkateswarlu Singh B.Kalendra 

作者机构：National Institute of Technology Raipur Indian School of Mines National Institute of Rock Mechanics Central Institute of Mining and Fuel Research 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2015年第25卷第2期

页      面：185-192页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：Financial support for this work is provided by M/s SECL CIL India 

主　　题：Underground coal mining Pot hole subsidence PHSR CPHSR 

摘      要：Ground subsidence induced by extraction of coal seam belowground brings about changes in surface environment leading to trough and pot-hole ***-hole subsidence is extremely hazardous and does not give any prior indication before its *** India,several pot-holes have occurred in the coal mines of South Eastern Coalfields Limited triggering the need for in-depth *** line with the requirement,literature review and field investigations were conducted to develop an in-depth understanding of various parameters influencing the occurrence of *** critical parameters identified were rock to soil ratio,depth to height of extraction ratio,brittleness index of rock and rock *** assessment of pot-hole subsidence has been done by developing an empirical rating approach named as pot-hole subsidence rating(PHSR),involving the critical parameters with suitable corrections for certain structural and mining conditions to obtain corrected PHSR(CPHSR).CPHSR was then applied for all the 34pot-holes studied and it was found that all the pot-holes fall under Class I and Class II category of risk representing a very high to high risk *** effort was made for the estimation of pot-hole depth utilizing the developed CPHSR in both the development and depillaring *** developed approach was found to yield consistent results in pot-hole depth prediction.