Results 21 to 30 of about 469 (202)
Position-optimization on retained entry and backfilling wall in gob-side entry retaining techniques [PDF]
International Journal of Coal Science & Technology, 2015 This study investigates the stability problem of gob-side entry retaining (GER) and backfilling wall which located under the key block B. Based on the combined research of elastic–plastic mechanics, structure mechanics and modern theory of mining-induced pressure, the caving characteristic and roof structure over the GER were analyzed, and the vertical
Feng, Xiaowei, Zhang, Nong
openaire +1 more source
Mechanical models and support technologies for retaining gob-side entry [PDF]
Proceedings of the Taishan Academic Forum - Project on Mine Disaster Prevention and Control, 2014 Aiming at gob-side entry retaining for three typical roof conditions (hard roof, medium stable roof and limestone roof), theoretical analysis, numerical simulation, laboratory test and field test were carried out. Different support mechanical models were built, and various roadside support technologies were presented.
Tongbin Zhao +3 more
openaire +1 more source
Gong-kuang zidonghua, 2021 In Lianghuai area of China, due to the influence of the large buried depth of the mine and the complicated roof conditions, when gob-side entry is retained, the roof deformation of the gob-side entry retaining is large, the coal side is easily extruded ...
SHEN Binxue1,2 +7 more
doaj +1 more source
Distribution Law of Mining Stress of the Gob-Side Entry Retaining in Deep Mining Thin Coal Seam
Advances in Civil Engineering, 2021 In order to explore the mining pressure development rule of gob-side entry retaining during deep thin coal seam mining, FLAC3D numerical simulation is applied to analyze the stress distribution rule of gob-side entry retaining, observing the left third ...
Tao Qin +5 more
doaj +1 more source
Asymmetric support technology for gob side entry retaining with high water material [PDF]
Acta Geodynamica et Geomaterialia, 2021 The gob side entry retaining with high water material is often used in coal mines. To study the stress evolution characteristics of surrounding rock and asymmetric support control technology of gob side entry retaining with high water material, the evolution law of stress and deformation of surrounding rock in gob side entry retaining during working ...
Qiyuan Shan +3 more
openaire +1 more source
Shock and Vibration, 2020 To solve the control problem of the surrounding rock of gob-side entry retaining under typical roof conditions in deep mines, we conduct theoretical analysis, numerical simulation, and actual measurements.
Jingke Wu +6 more
doaj +1 more source
Research on Control Mechanism of Surrounding Rock of Deep Gob-Side Entry Retaining [PDF]
Geofluids, 2021 To address the large deformation of the surrounding rock of deep gob-side entry retaining under high stress, lithological characteristics of the surrounding rock and failure model of support body and their evolutionary processes are analyzed through field investigation and theoretical analysis.
Jianxiong Liu +6 more
openaire +2 more sources
Determination of cyclic filling length in gob-side entry retained with roadside filling and its application [PDF]
Shock and Vibration, 2020 Abstract Gob-side entry retained with roadside filling (GER-RF) plays a key role in achieving coal mining without pillar and improving the coal resource recovery rate. Since there are few reports on the cyclic filling length of GER-RF, a method based on the stress difference method is proposed to determine the cyclic filling length of GER-RF ...
Zizheng Zhang +5 more
openaire +2 more sources
The Stability of Gob‐Side Entry Retaining in a High‐Gas‐Risk Mine
Advances in Civil Engineering, 2019 There are series of problems faced by most of the coal mines in China, ranging from low‐coal recovery rate and strained replacement of working faces to gas accumulation in the upper corner of coalfaces. Based on the gob‐side entry retaining at the No. 18205 working face in a coal mine in Shanxi Province, theoretical analysis, numerical simulation, and ...
Junwen Zhang, Yulin Li
openaire +2 more sources
A New Gob-Side Entry Layout Method for Two-Entry Longwall Systems
Energies, 2018 The gob-side entry layout is popular at two-entry longwall mine sites in China for the benefit of improving the coal recovery rate. Currently, two methods have been widely used to develop gob-side entries, including gob-side entry retaining and gob-side ...
Rui Wu +4 more
doaj +1 more source