Results 91 to 100 of about 1,845,683 (177)
Applied SciencesThe return roadway in Limin Coal Mine experiences strong mine pressure during the mining work of the I030902 working face, which poses potential safety hazards to production and management. Therefore, hydraulic fracturing is used to relieve pressure on the free coal pillar roof. Hydraulic fracture simulation tests using gelatin materials were conducted,
Tong Sun +5 more
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Advances in Civil Engineering, 2020 This paper studies and introduces the successful case of gob-side entry retaining technology and the typical mining pressure law in Luan mining area, which is the main mining coal seam in Qinshui coalfield. Qinshui coalfield has an estimated coal reserve
Meng Zhang +6 more
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The Stability of Gob-Side Entry Retaining in a High-Gas-Risk Mine
, 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.
Junwen Zhang, Yulin Li
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GeofluidsAs the key engineering structure of continuous coal mining, the surrounding rock disaster mechanism of gob‐side entry has always been a research hotspot. In purpose of researching the disaster mechanism of adjacent rock, this paper takes the background of the −240 working face of Dongbaowei 36 #
Xuefeng Zhang +4 more
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Web-Based Roadway Geometry Design Software for Transportation Education [PDF]
Traditionally, students use pencil and ruler to lay out lines and curves over contour maps for roadway geometry design. Numerous calculations of stopping sight distance, minimum turning radius, and curve alignments are required during the roadway design ...
Chen-Fu Liao, David Levinson
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Three-dimensional pressure-relief prevention and control technology and its application in deep gob-side entry [PDF]
In response to the challenges posed by significant deformation and maintenance difficulties in the surrounding rock of deep gob-side entries. This study focuses on the 7312 head entry as the research background.
Jun WANG +6 more
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, 2020 China has a large number of coal resources in “three-soft” geological conditions. The roof of these coal seams is soft and has low strength. Under this condition, gob-side entry retaining can be carried out under the guidance of roof leading holes to ...
Tao Yang, Jie Zhang
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Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesThe stability of the gob-side roadway roof poses a significant challenge for safe mine production. To address this pressing issue, the gangue slurry utilization has emerged as a popular strategy to ameliorate the stress environment within gob-side ...
Jiaqi Wang +6 more
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Spontaneous caving and gob-side entry retaining of thin seam with large inclined angle
, 2014 Based on the research method of combining simulation analysis with field testing by distinct element process UDEC, we have analyzed the roof deformation and failure laws and roadway support technology of gob-side entry retaining in a thin seam with a ...
Yongqin Zhang +4 more
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Meikuang Anquan, 2023 Aiming at the occurrence of rock burst along gob-side roadway in No.705 mining area of Baojishan Coal Mine, the occurrence mechanism of rock burst in folding structure is studied by means of field investigation, theoretical analysis, numerical simulation and field test.
LIU Chang +3 more
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