Design of An Intelligent Control System for Underground Directional Drilling Trajectory in Coal Mines

Li, Wangnian; Wu, Min; Ke, Yinglin; Li, Quanxin; Lu, Chengda; Du, Sheng

doi:10.23919/ccc55666.2022.9902602

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…Distributed optical fiber sensing technology can be used to obtain the continuous distribution information of the measured field in time and space at the same time along the optical fiber path, which can accurately locate the position of the event and make up for the lack of test accuracy in the deformation monitoring of mining overburden [13]. At the same time, the distributed optical fiber is suitable for coal mining overburden deformation monitoring because of its high stability [14], wide monitoring range [15], strong anti-electromagnetic radiation ability [16], dynamic perception [17], and other advantages. Based on the many advantages of distributed optical fiber technology, the deformation of mining overburden is monitored to provide technical support for the safe advancement of the coal mining face.…”

Section: Introductionmentioning

confidence: 99%

Research on Subsidence Prediction Method of Water-Conducting Fracture Zone of Overlying Strata in Coal Mine Based on Grey Theory Model

Li,

He,

Piao

et al. 2023

Water

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The development height and settlement prediction of water-conducting fracture zones caused by coal seam mining play an important role in the stability of overburden aquifers and the safety of roadways. Based on the engineering geological data of the J60 borehole in the Daliuta Coal Mine and the mining conditions of the 2−2 coal seam, China, this study established a similar material test model of mining overburden. The deformation characteristics of overlying strata in the mining process of coal seam were studied by using distributed optical fiber sensing technology, and the development height of water flowing fractured zone was determined. According to the equidistant sampling characteristics of Brillouin optical time domain reflection technology and the principle of the grey theory model, the settlement prediction model of the water-conducting fracture zone was established. By analyzing and comparing the prediction accuracy of the GM (1, 1) model, grey progressive model, and metabolic model, the optimal method for settlement prediction of the water-conducting fracture zone was discussed. The results show that, for the metabolic model, with the increase in the number of test sets and the decrease in the number of prediction sets, the mean square error ratio c and the small error probability p of the prediction accuracy evaluation parameters display a downward trend. The accuracy is related to the sudden change in the settlement of the water-conducting fracture zone caused by the breaking of the key stratum of the overlying rock. The optimal time of test sets selected for the best settlement prediction model is 7~8, and that of prediction sets selected is 5~6. For the GM (1, 1) model and the grey progressive model, the prediction accuracy of mining overburden subsidence is grade 4, which is not suitable for settlement prediction of water-flowing fractured zones.

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Section: Introductionmentioning

confidence: 99%

Research on Subsidence Prediction Method of Water-Conducting Fracture Zone of Overlying Strata in Coal Mine Based on Grey Theory Model

Li,

He,

Piao

et al. 2023

Water

View full text Add to dashboard Cite

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Design of an Intelligent Control System for Compound Directional Drilling in Underground Coal Mines

Li,

Wu,

Chen

et al. 2024

JACIII

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The compound directional drilling process, including slip and rotation, is the key to realizing long-hole drilling in coal mines. First, a compound directional drilling process control scheme is proposed to realize intelligent control of the directional drilling process. An intelligent drilling process optimization method was designed to improve drilling efficiency. A robust controller for the drilling rate based on gain scheduling was designed to achieve stable control of the drilling rate during sliding deflection drilling. A robust controller based on hybrid sensitivity was designed to achieve stable control of the drilling rate during rotary inclined stabilization drilling. The results of this study can provide a theoretical basis for realizing the intelligent optimization and control of compound directional drilling in coal mines.

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Design of An Intelligent Control System for Underground Directional Drilling Trajectory in Coal Mines

Cited by 2 publications

References 11 publications

Research on Subsidence Prediction Method of Water-Conducting Fracture Zone of Overlying Strata in Coal Mine Based on Grey Theory Model

Research on Subsidence Prediction Method of Water-Conducting Fracture Zone of Overlying Strata in Coal Mine Based on Grey Theory Model

Design of an Intelligent Control System for Compound Directional Drilling in Underground Coal Mines

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