Identifying the geological interface of the stratum of tunnel granite and classifying rock mass according to drilling energy theory

Li, Shucai; Xue, Yiguo; Tian, Hao; Li, Zhiqiang; Wang, Zhechao; Qiu, Daohong; Yang, Weimin

doi:10.1007/s12517-015-2055-5

Cited by 14 publications

(3 citation statements)

References 22 publications

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“…Based on Drilling Specific Energy e chipping specific energy was first proposed by Teale [41], and its meaning is the energy required to break a unit volume of rock, which is usually measured by the chipping method in the laboratory. Crushing specific energy can be used to classify rock drillability, and some scholars have also extended this method to the prediction of rock strength and the prediction of special underground structures [11,33,[45][46][47][48].…”

Section: Rock Classification and Strength Predictionmentioning

confidence: 99%

“…e quantitative relationship model of uniaxial compressive strength (DP-UCS model) was tested by a functional rock drilling test system based on self-development, and the test results showed that the error of the model was less than 10%. Tian et al [33] and Li et al [47] established an energy equation based on the drilling process and conducted drilling tests in the tuff formation. e results showed that the drilling rig parameters and drilling energy surrounding rock lithological response were high and passed the analysis of the energy curve which found that the drilling energy can be used to classify rock mass sections, determine the grade of surrounding rock, and predict faults.…”

Section: Introductionmentioning

confidence: 99%

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Research on Formation Identification Based on Drilling Shock and Vibration Parameters and Energy Principle

Tan

Miao

et al. 2021

Shock and Vibration

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In geotechnical engineering and geological survey, the stratum structure and its corresponding physical and mechanical properties are the most concerned. The stratum structure not only affects the safety of the project but also plays a decisive role in the construction method and construction sequence. In this paper, a new type of stratum geological interface recognition system is adopted, and an R-20 rotary drilling rig is used to conduct on-site drilling experiments for a granite site with no ventilation. The research results show that the system can monitor and record the main parameters (axial pressure, drilling rate, rotation speed, flushing fluid pressure, and torque) of the drilling rig during the drilling process. The comparative analysis of monitoring data and on-site survey results shows that different drilling parameters have different sensitivities to changes in the formation structure. According to the prediction accuracy, the ranking from high to low is drilling rate, axial pressure, torque, rotation speed, and flushing fluid pressure. In drilling engineering, by observing the change law of drilling rig parameters, not only can the position of the special rock mass interlayer be predicted, but also the stratum structure and strength can be identified, and the prediction formula is also given. Based on the established drilling specific energy formula, the energy analysis method is used to predict the formation structure and compressive strength, and the corresponding prediction formula is given. The research results show that, compared with the single drilling parameter prediction method, the rock-soil structure and strength identification method based on energy theory has higher prediction accuracy and can meet engineering needs.

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Section: Rock Classification and Strength Predictionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on Formation Identification Based on Drilling Shock and Vibration Parameters and Energy Principle

Tan

Miao

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…In the simulation, more complicated conditions can be considered, such as the initial stress and properties of the rock mass. In mechanical models, specific energy is widely used to relate the parameters of rig to the properties of rock; however, the specific energy is dependent on the applied push force and may only give relative results [24][25][26][27][28][29]. Zhang et al [30] proposed an index for the rock drillability based on dimension analysis method and identified different kinds of rock mass in the in situ tests.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Comprehensive Real‐Time Methods to Determine Geological Condition of Rock Mass along the Boreholes while Drilling in Underground Coal Mines

Niu

Zhang

et al. 2019

Shock and Vibration

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The geological condition is essential for mining design and disaster control in underground coal mines. The present research focuses on the real-time assessment method on rock mass condition during drilling boreholes. In situ comprehensive experiments were carried out using three methods, which are measurement while drilling (MWD) system, vibration measurement while drilling (VMWD) system, and borehole camera detecting system. In the MWD system, the operating parameters of the drilling machine were recorded, and a dimensionless index Id based on the collected parameters was adopted to assess the geological condition along the borehole. The results show that the state of rock mass can be well classified using the MWD system for both the cross-layer and in-seam boreholes. In the VMWD system, the vibration of the drilling bit was monitored, and the signal was analyzed in both time domain and frequency domain. The results indicate that the rock mass condition can be quantitatively evaluated using the mean square value of the signal and qualitatively estimated using the energy of the spectrum. In the borehole camera system, the photos of the rock mass along the borehole could be well captured, and the identified rock mass condition was used to verify the results of the MWD and VMWD systems. Comprehensive compassion between the results from the three systems shows that all the methods can give valuable information for the geological condition, and the outcomes of the different methods are generally comparable. For practical purposes, the advantages of the involved three detecting systems are discussed.

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Experimental study on identification of layered rock mass interface along the borehole while drilling

Yue

Wang

et al. 2022

Bull Eng Geol Environ

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Identifying the geological interface of the stratum of tunnel granite and classifying rock mass according to drilling energy theory

Cited by 14 publications

References 22 publications

Research on Formation Identification Based on Drilling Shock and Vibration Parameters and Energy Principle

Research on Formation Identification Based on Drilling Shock and Vibration Parameters and Energy Principle

Experimental Study on Comprehensive Real‐Time Methods to Determine Geological Condition of Rock Mass along the Boreholes while Drilling in Underground Coal Mines

Experimental study on identification of layered rock mass interface along the borehole while drilling

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