• 不 限
  • 期刊论文
  • 硕博论文
  • 会议论文
  • 报 纸
  • 英文论文
  2. 您的位置
  3. 首页
  4. 期刊论文
  5. Analysis of main roof breaking form and its mechanism during first weightingrnin longwall face

Analysis of main roof breaking form and its mechanism during first weightingrnin longwall face

来源 :煤炭学报（英文版） | 被引量 : 0次 | 上传用户：zyqtc1989
【摘 要】
：
By field observation and simulating test in shallow seam logwall mining, the asymmetry breaking of main roof is discovered during the first weighting. Based on simulating model test and theoretical analysis, the mechanism of main roof first breaking is re
【作 者】
：
HUANG Qing-xiang 
【机 构】
：
Dep. of Missing Engineering, Xi’an University of Science & Technology, Xi’an 710054, China
【出 处】
：
煤炭学报（英文版）
【发表日期】
：
2001年1期
【关键词】
：
main roof first breaking asymmetry mechanism 
下载到本地 , 更方便阅读
下载此文 赞助VIP
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
By field observation and simulating test in shallow seam logwall mining, the asymmetry breaking of main roof is discovered during the first weighting. Based on simulating model test and theoretical analysis, the mechanism of main roof first breaking is revealed, and the asymmetry breaking parameter is determined at all.
其他文献
Study of trace elements in coal and mining wastes and its significance in China
In the world energy about 26% of all was derived from coal combustion. Nearly 80% of the electricity produced in China is generated from coal. Coal will play the most important role in the coming 50 years as the past century in China. However one conseque
期刊
Chinese coalmining wastestrace elementsenvironmental and health significance
A NEW NUMERICAL SCHEME FOR ELASTIC-PLASTIC SIMULATION OF EXCAVATION IN GEO-ENGINEERING
For the path dependency and nonlinearity introduced by incremental construction, numerical method has been widely used in deformation analysis of geo-engineering.In the numerical simulation scheme commonly used in the past, the excavating loads are extrac
期刊
elastic-plastic simulationfinite element methodgeo-engineeringsimulation sche
Applying BP neural network to detect conveyor belt fire with multi-sensors
A kind of feed forward neural network with three layers was applied to detect conveyor belt fire faster. And backward propagation (BP) algorithm was used to train the network parameters. The appropriate parameters and architecture of network were obtained
期刊
neural networkfireconveyor beltcarbon monoxide
Study on rock burst of fully mechanized sublevel caving mining in deep mine
The theoretical analysis, numerical simulation and field observation were used to study distribution characters of abutment pressure of fully mechanized sublevel caving face in deep mine, fully mechanized sublevel caving and pressure relief in entries alo
期刊
rock burstfully mechanized sublevel cavingdeep mine
Analysis of soft rock roadway deformation mechanism in Zhangshuanglou Mine
On basis of ground stress surveying and analysis of physical nature and mechanics character of rock, the deformation mechanism of west main roadway in Zhangshuanglou Mine is studied. It is put forward that engineering mechanics nature, infiltration of wat
期刊
soft rockroadwaydeformation mechanismfloor heave
The principle analysis of methane explosion suppressed by water column curtain in coal mining
The principles of fine water mist explosion-extinguishing system was introduced. The defects of current systems were analyzed. The concept of a new water column curtain and the explosion-extinguishing mechanism were given. Using water column curtain to su
期刊
fine water mistwater column curtainmethane explosionextinguish
Genetic algorithms and aquifer parameter identification
In order to identify aquifer parameter,authors develops an improved combinatorial method called best chromosome clone plus younger generation chromosome prepotency genetic algorithm (BCC-YGCP-GA), based on a decimal system simple genetic algorithm (SGA).
期刊
aquifer parameter identificationgenetic algorithmideal modelfinite element me
Study on relation between tectonic stress and coal-mining subsidence with similar material simulatio
Using a minitype and stress-type test device for similar material simulation of coal-mining subsidence, the relation between tectonic stress and coal-mining subsidence was successfully simulated, furthermore, the test period of similar material simulation
期刊
tectonic stresscoal-mining subsidencesimilar material simulationstress-type t
Research on the sensitivity for the coal mine gas concentration detection by laser spectrum absorpti
Because of the former gas chemistry examination method defects, tunable diode laser absorption spectrum technology (TDLAS) was used. Itused an isolated absorption spectrum of the gas molecule to measure the gas absorption spectrum in order to distinguish
期刊
coal mine gasspectral absorptionsecond harmonic (2f)signal-to-noise ratio
Engineering study on roadway support in high-stress composite soft rock
The present study is focused on the roadway support in high-stress composite soft rock. This paper expounds the two main features of roadway in soft rock, i.e., great deformation of surrounding rock and remarkable rheological deformation. Furthermore, on
期刊
high stresscomposite soft rockroadwaystrong force bolting and shotcreting mes