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Strain energy analysis of floor heave in longwall gateroads [PDF]
Royal Society Open Science, 2018 Floor heave in longwall gateroads is a severe issue that affects mining safety and efficiency. Researchers, however, have limited understanding on the floor heave mechanism because the deformation of post-failure rocks in the floor was seldom considered ...
Meng Wang +3 more
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Yantu gongcheng xuebao, 2022 Under the complex stress environment of deep high ground stress and interlayer weak interlayer (structural surface), the deformation of the surrounding rock of composite coal (rock) roadway is severe, and the floor heave is particularly prominent.
ZHANG Dong 1, BAI Jian-biao 1, 2, YAN Shuai 2, WANG Rui 1, MENG Ning-kang 1, WANG Gong-yuan 1
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Numerical analysis of floor heave control technology of combined inverted arch-floor pile
Meikuang Anquan, 2022 In order to solve the problem of floor heave control in deep soft rock roadway, based on the engineering background of the 18th floor track roadway in the south of the fourth level of Xing’an Mine, a new type of bottom heave control technology, that is ...
GUO Dongming +6 more
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Meikuang Anquan, 2022 Aiming at the serious problem of floor heave of the high-stress deep roadway, take 4# bottom-draining roadway in the north wing of the first mining area of Chiyu Coal Mine as an example, the law of non-linear large deformation of the floor of the roadway
XIONG Huaixin +6 more
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Geofluids, 2022 A floor heave is usually a serious failure phenomenon in mine roadways, especially in the conditions of a wet soft rock. There are bright prospects for using a method of reinforcing for controlling a floor heave in mine roadways under a dramatic heave ...
Ivan Sakhno +3 more
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Study on failure characteristics and control of soft rock roadway floor
Meitan kexue jishu, 2023 In order to study the regularity of floor heave deformation and instability of soft rock roadway under different horizontal stress boundary conditions, the return air roadway of 50213 working face of Guantun Coal Mine was taken as the engineering ...
ZHANG Jie +7 more
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Study of Floor Heave Mechanism in Deep Soft Rock Roadway
DEStech Transactions on Environment, Energy and Earth Science, 2017 Flac3D is utilized to study floor heave mechanism and propose corresponding solving method of floor bolt-grouting in roadways under 550m in Longmei company. In addition, Flac3D can perform the simulation of stress field and displacement field and plastic zone in order to improve rationality of the scheme.
Xiaoyu Zhang +3 more
openaire +2 more sources
Secondary frost heave in freezing soils [PDF]
, 1996 Frost heave describes the phenomenon whereby soil freezing causes upwards surface motion due to the action of capillary suction imbibing water from the unfrozen region below. The expansion of water on freezing is a small part of the overall surface heave
Noon, C.
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An impedance approach to reduce the contact-instability whilst drilling with active heave compensation [PDF]
, 2012 The bit-bounce, or contact-instability, phenomenon which occurs in the drill string suspended from a floating vessel with an active drill string compensator to maintain a steady weight on the drill bit is investigated.
Hatleskog, Jan, Dunnigan, Mathew Walter
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Floor heave monitoring using floor instrumentation
, 2020 Several underground coal mines in Australia have recently reported and anticipated significant floor heave in gateroads during longwall retreat. Floor heave on longwall retreat is typically attributed to a stress notch.
Terri O'Sullivan (20180298) +5 more
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