Conversion of the waste drilling mud to renewable grouting materials in deep shaft sinking

Xu, Zhipeng; Feng, Xuhai; Chen, Zhenguo; Li, Shengsheng; Liu, Changwu

doi:10.1016/j.conbuildmat.2022.129851

Cited by 7 publications

(4 citation statements)

References 45 publications

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“…The relative density of soil particles is 2.70, and the initial void ratio of the mixed mud slurry is calculated to be 6.75. Assuming that after the first stage of dewatering, the mud slurry reaches the state shown in Figure 5b with a water content of 150%, and then the corresponding initial void ratio of the mud cake is 4.05, according to the initial thickness h 01 and the initial void ratio e 0 of the mixed mud slurry before pressure filtration, the initial thickness h 0 of the mud cake when the pressure filtration process reaches the state shown in Figure 5b can be calculated from Equation (6).…”

Section: Calculation Parameter Valuesmentioning

confidence: 99%

“…As an important auxiliary material in engineering construction, mud slurry is widely used in a large number of underground engineering construction projects such as castin-place piles, underground diaphragm walls, and trenchless construction [1,2] due to its important functions of lubrication and cooling, hole cleaning and slag discharge, mud slurry wall protection, etc. However, the mud slurry will be mixed with a large amount of drilling cuttings and other debris produced in the construction process [3], resulting in a change in its properties after a few cycles of recycling, rendering it unusable and thus inevitably generating huge quantities of waste engineering mud slurry, which are huge in volume, complex in composition, and extremely high in water content [4], and, as a typical construction waste product, pose a great threat to the environment if not handled properly [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Factors Affecting the Performance of a Pressure Filtration–Flocculation–Solidification Combined Method for Mud Slurry Treatment

Han,

Xie,

Bai

et al. 2023

Applied Sciences

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A pressure filtration–flocculation–solidification combined treatment possesses great potential for the reutilization of the waste mud slurry generated from diverse construction projects as filling material due to its versatility and high efficiency. However, very limited existing studies have focused on the factors affecting pressure filtration’s efficiency. In this paper, a calculation model for compression filtration is established based on laboratory pressure filtration model tests and one-dimensional large-strain consolidation theory. The influence of various parameters on pressure filtration’s efficiency is analyzed, and favorable values for these parameters are recommended. The results show that an increased initial mud cake thickness significantly increases the dewatering time and reduces the treatment’s efficiency. A lower dewatering time and higher efficiency can be achieved by increasing the filtration pressure, but the efficiency improvements become limited after reaching the critical pressure threshold. For the mud slurry used in this study, the optimal values for the initial mud slurry bag thickness, filtration pressure, and dewatering time are 240 mm, 1.0 MPa, and 30 min, respectively, yielding a final mud cake water content of 58.7% after filtration.

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Section: Calculation Parameter Valuesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the Factors Affecting the Performance of a Pressure Filtration–Flocculation–Solidification Combined Method for Mud Slurry Treatment

Han,

Xie,

Bai

et al. 2023

Applied Sciences

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“…Thus, the development of high-efficiency and low-energy barite recovery technology is of great significance in the treatment of waste drilling fluids. Waste drilling fluid is a complex steady-state colloidal system that contains a significant amount of soluble salts [19][20][21], barite, clay, rock chips, and other minerals, which are prone to modification and have a high clay content [22]. Therefore, it is difficult to achieve effective separation and recovery of barite using only physical methods such as simple physical sedimentation and centrifugal separation.…”

Section: Introductionmentioning

confidence: 99%

Flotation recovery of barite from high-density waste drilling fluid using β-cyclodextrin as a novel depressant and its mechanism

Li,

Xie,

et al. 2024

PLoS ONE

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High-density waste drilling fluid contains an abundance of recyclable weighting reagents, direct disposal can pollute the environment. In this paper, the primary mineral composition of a high-density waste drilling fluid from a well in the southwest oil and gas field was analyzed. This paper proposes β-cyclodextrin (β-CD) as a depressant for the recovery of barite from waste drilling fluid. The recovery process was investigated through inverse flotation experiments, and the mechanism was analyzed using zeta potential, contact angle analysis, and FTIR. The flotation experiments showed that under the SDS flotation system, when the pH was 9.0 and the amount of depressant β-CD was 900 g/t, the barite recovery and density reached the highest values, which were 87.41% and 4.042 g/cm3, respectively. Zeta potential experiments, contact angle analysis, and FTIR analysis indicate that β-CD adsorbed onto barite through enhancing the hydrophilicity of barite, electrostatic force adsorption, and strong adsorption, which could not be displayed by SDS through competitive adsorption. Furthermore, β-CD exhibited a selective inhibitory effect on barite and enabled reverse flotation. The mechanism model of the flotation separation process was established.

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“…Waste slurry has been used in other fields, such as ceramic fabrication, according to the different chemical compositions [ 18 , 19 , 20 ]. Meanwhile, in construction engineering, grouting material was created by reusing the slurry (shield tunnels [ 21 , 22 , 23 , 24 ] and waste drilling [ 25 ]).…”

Section: Introductionmentioning

confidence: 99%

Reuse of Drilling Waste Slurry as the Grouting Material for the Real-Time Capsule Grouting Technique

et al. 2023

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A large amount of waste slurry is generated during construction, but direct sedimentation and transportation increase construction costs. Improper treatment leads to ecological and environmental pollution. This paper proposes to reuse drilling waste slurry (DWS) as a raw material from a particular project as a grouting material for the real-time capsule grouting technique (RCG) to replace cement grouting material. This not only deals with DWS but also solves the material demand of RCG. An orthogonal experimental design evaluated the performance of the DWS grouting material (DWS-GM). The five levels for the three factors of this experiment were selected, including the fluidity, bleeding rate, initial setting time, and compression strength. A linear model, support vector machines, and neural networks were used to construct regression models, and the effects of different contents of cement, bentonite, and fly ash on the DWS-GM performance were analyzed. The SVM regression model had better performance in describing the laws of fluidity, bleeding rate, and 28-day compressive strength. Furthermore, the optimization model is proposed to obtain the optimal formulation of the DWS-GM under specific constraints. The optimization results show that the optimal formulation of the DWS-GM was 5.6% cement and 6.9% bentonite. The BL, FL, IST, and 28DCS were 1.61%, 21.87 cm, 27.05 h, and 0.22 MPa to meet the functional requirements of the DWS-GM. The above research fully proves the feasibility of the DWS reuse application. We will further reuse DWS to develop other multifunctional material applications in combination with the control needs of RCG technology and technology from other fields.

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Conversion of the waste drilling mud to renewable grouting materials in deep shaft sinking

Cited by 7 publications

References 45 publications

Study on the Factors Affecting the Performance of a Pressure Filtration–Flocculation–Solidification Combined Method for Mud Slurry Treatment

Study on the Factors Affecting the Performance of a Pressure Filtration–Flocculation–Solidification Combined Method for Mud Slurry Treatment

Flotation recovery of barite from high-density waste drilling fluid using β-cyclodextrin as a novel depressant and its mechanism

Reuse of Drilling Waste Slurry as the Grouting Material for the Real-Time Capsule Grouting Technique

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